At least four Taliban militants have been killed and two others injured in clashes in the northern Afghanistan's Kunduz province on Thursday, district governor Amanudin Qurishi said.

The clashes, according to the official, erupted early morning after Taliban insurgents targeted security checkpoints and police, which lasted for more than three hours. The insurgents fled away after leaving four bodies and two injured behind.

There were no casualties on the security personnel, the official said.

Taliban militants who are in control of parts of Kunduz province with Kunduz city as its capital 250 km north of Kabul, have not commented on the clashes.

Meanwhile, security personnel discovered and defused three explosive devices planted in Kunduz city hospital on Thursday morning, police spokesman Mahfozullah Akbari said.

source: xinhua