The brother of the leader of the Afghan Taliban is reported to have been among those killed in a bomb blast at a mosque in southwest Pakistan.
Police said four people were killed and more than 20 injured on August 16 in the explosion at the mosque some 25 kilometers from the city of Quetta, the capital of restive Balochistan Province.
Taliban leader Haibatullah was not in the mosque when the bomb went off but his younger brother, Hafiz Ahmadullah, was among those killed, according to Afghan Islamic Press and Reuters, which cited two Taliban sources.
Pakistani police have not confirmed the identity of any of the victims.
No group has claimed responsibility for the blast in Quetta, the capital of Balochistan Province, which has been plagued by a series of attacks recently.
Five people, including two policemen, were killed and 27 injured in a blast near a police station in Quetta in July, a week after a similar explosion killed two people.
Balochistan has been the scene of a low-level insurgency by separatists demanding more autonomy and a greater share in the region's natural resources.
Balochistan is also key to the China-Pakistan Economic Corridor (CPEC), part of Beijing's Belt and Road initiative.
CPEC seeks to connect China's western province of Xinjiang with the Pakistani port of Gwadar, giving Beijing access to the Arabian Sea.