Nearly 20 police personnel and civilians have been killed in a wave of militant attacks across northwest Pakistan over the past two days, a police official said on Thursday, in the latest surge of violence to hit the restive border region.The attacks come days after Afghan and Pakistani forces traded fire along their porous frontier, each side blaming the other for the flare-up in hostilities.“Over the past 48 hours, 15 police personnel and four civilians have been killed in terrorist incidents across various parts of Khyber Pakhtunkhwa,” a senior police official told AFP.For all the latest headlines, follow our Google News channel online or via the app.According to the police official based in the provincial capital Peshawar, two police officers were also kidnapped and “are still missing.”Most of the attacks have been claimed by the Tehreek-e-Taliban Pakistan (TTP), a militant group that has stepped up assaults in Pakistan since the Afghan Taliban returned to power in Kabul in