Islamabad - Chief of Army Staff General Raheel Sharif yesterday conveyed military’s displeasure to the US over the recent drone strike saying it was detrimental to Pak-US ties and regional stability.

General Raheel’s reaction came during a meeting with the Ambassador of US David Hale at the General Headquarters in Rawalpindi, a statement issued by Inter Services Public relations (ISPR) said.

The statement said the situation arising after the US drone strike in Balochistan on May 22 came under discussion.

While expressing serious concerns over the drone strike, army chief said such acts of sovereignty violations are detrimental to relations between both countries and are counter-productive for ongoing peace process for regional stability.

“Pakistan’s efforts, successes and sacrifices in fight against terrorism have been unparalleled,” General Raheel added.

President Barack Obama on Monday confirmed Taliban Chief Mullah Akhtar Mansour was killed in a US air strike, hailing his death as an “important milestone” in efforts to bring peace to Afghanistan.

Saturday’s bombing raid, the first known American assault on a top Afghan Taliban leader on Pakistani soil, marked a major blow to the militant movement, which saw a new resurgence under Mansour.

Soon after Obama’s statement, Pakistan summoned the US ambassador to express concern over the drone strike inside its territory.

Ambassador David Hale was called in by the Special Assistant to the Prime Minister on Foreign Affairs Tariq Fatemi wherein the latter pointed out that the drone strike was a violation of Pakistan’s sovereignty, according to a Foreign Office statement.

The attack is also a breach of the United Nation’s Charter that guarantees the inviolability of the territorial integrity of its member states, he added.

Fatemi emphasised such actions could adversely impact the ongoing efforts by the Quadrilateral Coordination Group (QCG) for facilitating peace talks between the Afghan government and Taliban.

The latest US drone hit which targeted and killed Mullah Mansour has been taken by security establishment of Pakistan as another major breach of trust after the US raid on OBL compound Abbottabad and Salalah border post attack.

According to sources, this is not less than a betrayal by the US against a country which played key role in the war against terror and suffered countless losses in terms of men and material.

“It still remains a mystery why the US had not taken Pakistan into confidence prior to its drone attack, and informed hours after the attack,” said a senior security official on request of anonymity.

Sources also raised concerns about the mystery of Mullah Mansour’s travelling plans on Pakistani passport which could be forged in order to blame Pakistan. “It’s quite possible that enemies of Pakistan had planned the entire episode to malign it,” one source said.

Sources further said that Pakistan has been making sincere efforts for peace and stability in Afghanistan but its efforts were always sabotaged in one way or the other.

Sources said Pakistan has no direct control over Afghan Taliban as they had shifted their operations in Afghanistan after Pakistan attacked them and smashed their hideouts during the major military operation Zarb-e-Azb in North Waziristan agency.