Islamabad, Pakistan (CNN) -- Unknown assailants abducted 34 men early Friday in northwestern Pakistan, a senior political official said.
The kidnapped include 30 coal miners and four road construction workers, said Mohammad Iqbal. They had been staying overnight in tents in Bara Tehsil in Kyber Agency, a volatile tribal region in northwest Pakistan.
Iqbal said that no one has claimed responsibility for the abductions, adding that an investigation was being conducted.
That said, violence and kidnapping are not new to northwest Pakistan, near the Afghanistan border. It has a strong pro-Taliban presence and is home to members of the Haqqani network.
Last Tuesday, for instance, militants on motorcycles attacked a convoy of tankers carrying fuel for NATO through the area, senior Pakistani police official Ismail Kurd said.
U.S. authorities have responded with numerous suspected drone strikes, like the one that Pakistani officials said Friday killed three suspected militants.