Kabul, Afghanistan (CNN) -- Violence rippled through Afghanistan on Saturday, killing two civilians and a coalition service member and badly wounding a news photographer.
A local official told CNN that two civilians were killed by NATO-led forces in Afghanistan on Saturday.
Adam Khan Serat, a government spokesman in Wardak province, said two students were killed and another injured.
Coalition forces say they are investigating the incident, which occurred in Wardak's Maidan Shahr district. The province is in eastern Afghanistan.
NATO's International Security Assistance Force couldn't immediately confirm deaths. It said in a news release that two civilians were "possibly" killed in the incident, which started when insurgents attacked a coalition patrol with a bomb.
When the troops stopped to investigate and clear the area of bombs, insurgents fired at them and the patrol returned fire, ISAF said.
"During the attack, three Afghan citizens on a motorcycle entered the engagement area. Two of them fell off the vehicle and were taken away by local villagers. Their condition could not be verified by coalition forces before they were taken away," ISAF said.
In southern Afghanistan, an ISAF service member died after an insurgent attack. ISAF didn't provide the nationality of the servicemember or the precise location of the attack.
Also in the south, a news photographer was wounded Saturday after stepping on a mine while patrolling with U.S. troops, according to the New York Times.
Joao Silva was wounded in the town of Aghandab,, the Times said.
He was embedded with the 4th Infantry Division, which for several weeks has been working to secure routes into Kandahar. Silva was taken to the Kandahar Air Field and is receiving medical treatment.
CNN's Matiullah Mati contributed to this report