The Karnataka team, which arrived last evening, primarily wanted to know whether the arrested had any links with recent blast in Bangalore, police said.
The team members, led by a DYSP, held discussions with their Kerala counterparts and visited the building premises that was raided and from where some lethal weapons and inflammatory pamphlets were seized by police, they said.
The Karnataka officials met DSP Rahul R Nair and DYSP P Sukukamaran, who heads the special team probing the case.
Meanwhile, PF leaders refuted the charge that they had been running an "armed training" camp in the area and the premises that the police raided was just a "workout joint".