At least seven people, including three children, were injured after an explosion targeted police personnel in Pakistan's Peshawar city on Tuesday.

The injured people were shifted to  Lady Reading Hospital for treatment.

The condition of two children is said to be critical.

The ages of the children are between 7 to 10 years, the hospital’s spokesperson told Geo News.

SSP Operations Kashif Aftab Abbasi told the Pakistani news channel that the Machnigate Police Station’s mobile vehicle was on routine patrol when the bomb exploded.

“As soon as the police mobile passed by, the blast occurred three seconds later. The militants wanted to target the police vehicle,” he said, speaking with Geo News.

No arrests have been made so far.

Speaking with Geo News, Superintendent Police Arshad Khan — who was present at the incident — said the blast took place around 9:10am and the explosives were planted at the roadside.

The explosives used in the blast weighed 4kg and were hidden in a cement block on the roadside, he said.

Police have started searching the places nearby.

Rescue officials told Geo News that the glass of two vehicles and nearby buildings was broken due to the intensity of the explosion.