Christians said the two attackers tried to enter the building where pastors gathered for a refresher training course, but were stopped by the guard, a policeman, whose name was not immediately revealed.
Christians said the attack followed threats against the AoG, prompting local authorities to send initially two police officers to the church for security.
GIVING UP LIFE
Yet, there was only one policeman guarding the church during Friday's attack who "gave up his life in the line of duty," police said, adding that they are investigating the incident.
"We condemn the attack on the AoG Church," said Christian rights group Life for All Pakistan. "The security has been raised in other churches. We praise the guard who intercepted the attackers and saved other lives sacrificing his own," the group added n a statement to BosNewsLife.
The policeman was the latest casualty in what authorities call an ongoing "war against terror" in the province. There have been hundreds of terror attacks in the province, killing over 22000 people in the past five years, according to official estimates.
Friday's attack came amid heightened tensions after the province's Chief Minister Pervez Khattak of the ruling Pakistan Tehreek-e-Insaf (PTI) party reportely said that that Muslims "cannot be hired as sweepers and cleaners" as these jobs should be done by minorities, including Christians.
Several minority groups expressed their outrage over what they called the leader's "narrow-mindlessness" and demanded his resignation.
Life for All Pakistan said the remarks "that only the minorities are fit for sweepers has hurt the sentiments of the minorities" clearly violates PTI's campaign pledges including "giving equal rights and opportunities to the religious minorities". However, "after coming into power they speak and do otherwise," the group said.
The PTI has also threatened to halt supplies of the NATO military alliance and to shoot down the drones, the unmanned aircraft used by the United States to target militants.
Islamic militants, who rights activists claim have links to government officials, often described Christianity as a "Western religion" and accused Christians of having ties to "Western occupiers."