Dozens killed in the central city of Dera Ghazi Khan as Sufi shrine is struck by two bombs.

At least 41 people have been killed and more than 70 wounded, after twin blasts in the central Pakistani city of Dera Ghazi Khan hit a Sufi shrine, a rescue service official said.

"We have shifted 30 bodies and about 100 wounded to different hospitals," said Natiq Hayat, head of the city rescue service in Dera Ghazi Khan.

The explosions went off on Sunday, but no group immediately claimed responsibility for the attacks.

A police official, requesting anonymity because he was not authorized to speak to the media, said the shrine had received threats from unidentified hard-line fighters.

Reports from theatre said the attacks are going to "cause considerable anger because, once again, the victims are women and children and ordinary people".

The blasts took place outside the shrine of the 13th century Sufi saint Ahmed Sultan, popularly known as Sakhi Sarwar, in Dera Ghazi Khan district.

Both were suicide attackers, they came on foot and blew themselves up when police on duty stopped them.

However, a third suicide attacker was arrested before blowing himself up, where Pakistan security forces took him to an unknown place.

More than 4,150 people have been killed in suicide attacks and bomb explosions, blamed on homegrown Taliban and other groups, since government troops stormed a radical mosque in Islamabad in July 2007.