Suspected militants bomb a girl's school overnight in northwest Pakistan

This is a locator map for Pakistan with its capital, Islamabad, and the Kashmir region. (AP Photo)

ISLAMABAD (AP) 鈥 Pakistan鈥檚 military on Tuesday said a suicide bombing that killed five Chinese engineers and a Pakistani driver in March was planned in neighboring Afghanistan and that the bomber was an Afghan citizen.

At a news conference, army spokesman Maj. Gen. Ahmad Sharif said four men behind the March 26 attack in Bisham, a district in Khyber Pakhtunkhwa province, had been arrested.

Sharif said the attack that killed the Chinese engineers, who were working on Pakistan鈥檚 biggest Dasu Dam, was an attempt to harm the friendship between Pakistan and China. Thousands of Chinese are working on projects relating to the .

Sharif also said Pakistani Taliban who have sanctuaries in Afghanistan were behind a surge in attacks inside Pakistan since January that killed 62 security forces nationwide, and that Pakistan had solid evidence of the group's inovlevemnt in the rising violence.

The attacks have prompted several foreign embassies to take extra security measures, asking diplomatic staff and nationals in Pakistan to remain vigilant.

In a statement on Tuesday, the U.S. consulate said it was 鈥渁ware of a threat of a terrorist attack at Karachi Port,鈥 and asked its citizens and embassy staff to stay away from the area. It also advised them to keep a low profile and stay alert in places frequented by tourists.

Karachi 鈥 Pakistan鈥檚 largest city 鈥 has witnessed several militant attacks on Chinese and Pakistanis in recent years. Last month, five Japanese workers that targeted their van and killed a Pakistani bystander.

Sharif said the Afghan Taliban had failed to honor promises they made to the international community before coming to power, vowing no one would be allowed to use Afghan soil for attacks against any country.

The Pakistani Taliban 鈥 a separate group but a close ally of the Afghan Taliban which in Afghanistan in August 2021 鈥 had denied being behind the March attack, saying in a statement at the time that 鈥渙ur sole targets are security forces (and their agents) imposed upon us. We are in no way involved in this attack.鈥

On Tuesday, Mohammad Khurasani, spokesman for the Pakistani Taliban 鈥 known as Tehreek-e-Taliban Pakistan or TTP 鈥 repudiated using Afghan soil for attacks on security forces inside Pakistan. He said in a statement Tuesday the group's militants, who were present across the country, targeted security forces and military personnel.

Additionally, the army spokesman vowed not to allow any undocumented foreigners to remain in the country. He said Pakistan's military had completed 98% of a fence being constructed along the border with Afghanistan and 91% of a fence along the Iranian border had also been completed to check illegal movement, curb smuggling and prevent cross-border militant attacks.

Since last year, nearly 563,639 Afghans living illegally have after Islamabad launched a crackdown on illegal migrants, drawing widespread criticism from international and domestic human rights groups.

Afghanistan has never recognized the porous border that runs through the heartland of the Pashtun, Afghanistan鈥檚 largest ethnic group.

Sharif also dismissed media reports about the possibility of any deal or talks with the country's imprisoned or his party. Khan is serving multiple prison sentences on , and

Khan was in April 2022. He accused the military, his rival, Pakistani Prime Minister Shehbaz Sharif, and the United States of being behind his ouster. All three have denied the accusation.

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