It is a frontier area.

CNN: John D. Sutter

But an official with the Frontier Constabulary, which operates in the area, said the villagers had been killed by militants.

NPR: Pakistanis Protest Killing Of 18 In Village Raid

In short, frontier controls are indeed disappearing inside the Schengen area.

ECONOMIST: Those fuzzy frontiers

"He said he was calling from Miranshah in North Waziristan and the telephone number used to make the call carried an area code common to the Waziristan tribal area and Bannu, the adjoining district in the North West Frontier Province, " the paper said.

BBC: Unknown Pakistan group claims India's Pune bombing

The attack is the most recent in a series of attacks in Pakistan's North West Frontier Province and occurred near Sherpao's residence in Charsadda -- an area approximately 28 miles (45 kilometers) northeast of the city of Peshawar.

CNN: 'At least 50' dead in mosque bomb