LONDON - Prime Minister Nawaz Sharif Sunday said that Pakistan has strongly protested over a US drone attack near Pak-Afghan border which violated its sovereignty.

Responding to media queries after his arrival here in connection with his medical check-up, the prime minister said it was not yet confirmed that Mullah Akhtar Mansour, the leader of Afghan Taliban, was killed in the drone attack.

A person identified as Mohammad Wali, resident of Qilla Abdullah, was killed in the attack, he added.

US Secretary of State John Kerry, he said, phoned him last night and the US commander also talked to the Chief of Army Staff after the attack took place.

He said, “We strongly protest over such attack which happened after many years and is a violation of our sovereignty. It should not have taken place,” he added.