Pakistani Taliban militants stormed a security checkpoint in Pakistan's northwestern border area with Afghanistan, killing six soldiers and wounding four others, a government official said Tuesday.Pakistan has faced a surge in militant attacks along its border regions since the Taliban authorities retook control in Kabul in 2021.It accuses Afghanistan of harbouring the insurgents, a claim the Taliban government denies.Late Monday, more than a dozen armed men attacked the checkpoint, leading to a heavy exchange of fire in Kurram, a tribal district in Khyber Pakhtunkhwa province.