Now playing
00:49
Explosive device injures 15 at restaurant
Medics deploy at the scene of a reported explosion during a concert in Manchester, England on May 23, 2017. 
British police said early May 23 there were "a number of confirmed fatalities" after reports of at least one explosion during a pop concert by US singer Ariana Grande. Ambulances were seen rushing to the Manchester Arena venue and police added in a statement that people should avoid the area
 / AFP PHOTO / Paul ELLIS        (Photo credit should read PAUL ELLIS/AFP/Getty Images)
PHOTO: PAUL ELLIS/AFP/Getty Images
Medics deploy at the scene of a reported explosion during a concert in Manchester, England on May 23, 2017. British police said early May 23 there were "a number of confirmed fatalities" after reports of at least one explosion during a pop concert by US singer Ariana Grande. Ambulances were seen rushing to the Manchester Arena venue and police added in a statement that people should avoid the area / AFP PHOTO / Paul ELLIS (Photo credit should read PAUL ELLIS/AFP/Getty Images)
Now playing
01:11
Anatomy of an explosion
PHOTO: Aaron Kaiser
Now playing
00:47
Massive gas line explosion turns sky orange
Surveillance video shows coffee shop explosion
PHOTO: WALB/Georgia Dept. of Insurance and Safety Fire Commission
Surveillance video shows coffee shop explosion
Now playing
00:35
Watch as explosion erupts at coffee shop
PHOTO: CNN; @theundergroundbiz; Kat Walker
Now playing
00:54
Video shows massive gas station explosion
PHOTO: KTLA
Now playing
02:00
Investigators: Don't believe this was accident
PHOTO: Texas Department of Public Safety
Now playing
01:13
Video shows bomber blow himself up as officers near
title: File uploaded by user duration: 00:00:00 site:  author:  published:  intervention: no description:
PHOTO: Hurst Police Department
title: File uploaded by user duration: 00:00:00 site: author: published: intervention: no description:
Now playing
00:32
Police dashcam captures Texas home explosion
louisiana oil rig explosion wvue bts_00000724.jpg
PHOTO: WVUE
louisiana oil rig explosion wvue bts_00000724.jpg
Now playing
01:04
Explosion rocks oil rig in Louisiana
PHOTO: Reuters
Now playing
00:47
Explosions rock Ukraine ammunition depot
PHOTO: Ali Hussain
Now playing
00:35
Video shows manhole explode
damaged pipelines natural gas explosion marsh dnt tsr_00004224.jpg
PHOTO: Baltimore Police
damaged pipelines natural gas explosion marsh dnt tsr_00004224.jpg
Now playing
03:16
Leaking gas pipelines pose deadly threat
Location of the fire is at the Jiangsu Deqiao Storage Company Ltd in the New Port Industrial Park in Jingjiang city.  The fire reached 20 - 30 meters in the air with thick mushroom-like smoke.  According to rescue workers at the scene, the burning articles were two gas containers.  The company's main business is in storing, transferring, repartitioning and packaging liquid oil/gas products.  The factory zone has 12 fuel containers, diesel containers and gasoline containers, and 30 chemical storage containers.  
The report also quotes a villager Mr. Zhong, whose home is within 1km away from the storage zone that there are two villages near the company with over 1k villagers (altogether).
PHOTO: CCTV Weibo/CCTV Weibo/CCTV Weibo
Location of the fire is at the Jiangsu Deqiao Storage Company Ltd in the New Port Industrial Park in Jingjiang city. The fire reached 20 - 30 meters in the air with thick mushroom-like smoke. According to rescue workers at the scene, the burning articles were two gas containers. The company's main business is in storing, transferring, repartitioning and packaging liquid oil/gas products. The factory zone has 12 fuel containers, diesel containers and gasoline containers, and 30 chemical storage containers. The report also quotes a villager Mr. Zhong, whose home is within 1km away from the storage zone that there are two villages near the company with over 1k villagers (altogether).
Now playing
00:45
Explosion at chemical warehouse in China
PHOTO: City of Bremerton
Now playing
00:45
Surveillance video captures motel explosion
ghana gas station explosion pkg purefoy_00000709.jpg
PHOTO: Walter E. Adamah
ghana gas station explosion pkg purefoy_00000709.jpg
Now playing
01:14
Gas station explosion kills at least 150 in Ghana
cnnee brk explosion polvorin tultepec mexico video facebook_00000110.jpg
cnnee brk explosion polvorin tultepec mexico video facebook_00000110.jpg
Now playing
00:47
Deadly explosion at fireworks market
(CNN) —  

A manhunt is on in Canada after two men detonated an improvised explosive device, injuring 15 people late Thursday inside a restaurant in Mississauga, Ontario, near Toronto, police said.

“There’s no indication this is a terrorist attack. There’s no indication this is a hate crime,” Peel Regional Police Chief Jennifer Evans said during a Friday morning news conference. “At this time, we haven’t ruled anything out as we start our investigation.”

The suspects walked into the Bombay Bhel Indian restaurant in the city outside Toronto around 10:30 p.m. and detonated the device, police said. They then fled, police believe, in a vehicle, Evans said.

Surveillance photos show the men wearing jeans and dark-colored hoodies. One had his face covered with a black cloth, police said.

Two parties, including a birthday celebration, were going on at the restaurant at the time of the blast, Evans said.

It’s not clear whether those patrons were targeted, she said, adding they included children younger than 10.

’They need to be brought to justice’

Mississauga Mayor Bonnie Crombie called the explosion a “heinous crime” and said she was thankful no one was killed.

“This is certainly not anything you would expect to happen in Mississauga, not my Mississauga, this is not the Mississauga I know,” Crombie said Friday. “Certainly, the people who have done this need to answer for their crimes, and they need to be brought to justice.”

Twelve of the injured had been released from the hospital by Friday morning, Evans said. Those still being treated at a Toronto trauma center include a 35-year-old man and women, ages 48 and 62. Their injuries were critical, officials had said earlier.

The injuries were “consistent with those of an explosion,” said Brian Gibson, deputy chief at Peel Regional Paramedic Services.

The restaurant by Friday morning had been deemed safe from any other explosives, Evans said, adding that the site sustained a “considerable amount of damage.”

CNN’s Carma Hassan and Michelle Krupa contributed to this report.