Islamabad, Pakistan (CNN) -- A suicide blast killed at least 17 people in a tribal area in northwest Pakistan on Saturday, authorities said.
The blast injured 38 others in Darra Adam khel, near Peshawar, said Nasir Khan, a local government official.
Initial investigations indicate the bomb was targeting a base for anti-Taliban fighters, according to officials.
"The building targeted was the resistance fighters' office base," said Ghulam Farooq, another local official.
The Tehrik-e Taliban Pakistan operates in the area, according to Farooq.
Officials say the death toll could go up significantly. The building targeted was in a main market area at one of the busiest times of the day.