At least six people have been reported killed and 15 injured in an explosion in the eastern Pakistani city of Lahore.

"This was a suicide blast," Punjab government spokesman Malik Ahmed Khan said on April 5, adding that the attack targeted an army vehicle taking part in Pakistan's census.

Khan said the dead included four soldiers and two civilians.

"It appears to have been an act of terrorism," Punjab provincial Law Minister Rana Sanaullah said.

The Tehrik-e Taliban Pakistan (TTP) extremist group claimed responsibility for what it called a suicide attack.

On February 13, a Taliban suicide-bomb attack in Lahore, the capital of Punjab Province, killed 14 people.

With reporting by AFP, AP, and Reuters