At least four people have been killed in a suicide attack outside the south-western Pakistani city of Quetta in Balochistan province, police say.
Another 10 people were injured in the attack which took place in the town of Sohrab, 300km (186 miles) from Quetta.
The bomber blew himself up in a roadside restaurant on the town's outskirts, local police told the BBC.
They say that he entered the restaurant after parking his car outside, which also blew up.
Police say the man might may well have missed his target, a convoy of 40 trucks carrying supplies for Nato troops in Afghanistan.
The convoy departed from the restaurant half-an-hour before the suicide bomber arrived.
Correspondents say that militants frequently target supply trucks for US and Nato troops that travel through Pakistani territory.
Most such attacks usually occur in the border town of Chaman, one of two major crossing points for the trucks.
Militants have also attacked Nato supply lines in the north-west of Pakistan, especially through the famed Khyber Pass.