Pakistani security forces have detained a former pro-Taliban lawmaker in connection with the slaying of a Polish engineer by militants earlier this year, Press TV reported.
Shah Abdul Aziz, who has close links with militant groups, was taken into custody on Saturday.
"He (Aziz) is suspected of ordering the beheading of Polish engineer Piotr Stanczak," DPA quoted police officer Mahmood Khan as saying.
The arrest comes days after Attaullah Khan, one of Stanczak's alleged killers, confessed that the Taliban had killed the engineer on the orders of Aziz.
Stanczak, a Polish national, was abducted in September 2008 from a district near the troubled north-western region of Pakistan. Later in February the Taliban-linked militants had released a video showing his beheading.
Pakistan had refused to release 60 insurgents in return for Stanczak's freedom.