At least six people were killed and 50 wounded Friday when a bomb tore through a market in a mainly Shiite area of Pakistan's tribal belt, officials said.
The military said it was sending a helicopter to evacuate the wounded from Parachinar, capital of Kurram tribal district, as television footage showed shocked bystanders and ambulances in the market.
"Six people have been killed and more than 50 injured in the blast near a Shiite mosque in Parachinar market," Moeen Begum, a surgeon at the government-run hospital, told AFP.
"The death toll may rise and we are still receiving injured people," he said.
Local administration official Shahid Ali Khan confirmed the blast had taken place near the mosque.
"Many people have been injured, I can't tell the exact number," he said.
In February, a fresh wave of militant violence killed 130 people across Pakistan.