**A bomb has exploded near an intelligence office in the Pakistani city of Multan, killing at least four people, police say.**Seven others were injured in the blast, believed to have taken place in the Qasim Bela area in Punjab province.
The bomb comes just a day after two bombs exploded in a busy market in Lahore, killing at least 48 people.
More than 400 people have been killed during a string of attacks mounted by Islamist militants in recent weeks.
They coincide with an army offensive targeting the Taliban stronghold in the country’s north-west continues.
Television channel Express 24/7 showed images of damaged buildings and ambulances at the scene in Multan.
No-one has yet said they were behind the attack.
The explosion is believed to have occurred close to a security checkpoint
Police official Agaha Yousaf told the television channel it was too “premature” to say whether it was a suicide attack, the AFP news agency reported.