Malaysia Police Chief Khalid Abu Bakar held a news conference in Kuala Lumpur on Tuesday, giving an update on the investigation into the death of Kim Jong Nam.
"They have not got back to us. The Korean authorities have not got back to us even though we have requested them, as I've said earlier, that we requested them to hand them over back to us. They have not come back to us. I'm saying again that the Korean authorities are not cooperating with us in this investigation,” said Khalid Abu Bakar.
Four of the suspects, believed to have left Malaysia on the day of the killing of Kim Jong Nam, are DPRK nationals.
But Malaysian police chief told reporters some of the suspects are believed to still be in Malaysia, possibly at the embassy.
“We believe they are at the embassy compound. We believe so -- so remember I told you that for the Koryo staff, if he does not come forward, we will compel him to come,” said Khalid Abu Bakar.
In an attack many believe was orchestrated by the DPRK, Kim Jong Nam died less than 20 minutes after two women wiped VX nerve agent on his face at Kuala Lumpur airport on February 13, authorities say.
The women, one from Vietnam and one from Indonesia, have been charged with murder.
The DPRK has denied any role in the killing and accuses Malaysia of conspiring with its enemies. DPRK Ambassador Kang Chol has rejected a Malaysian autopsy that found Kim was killed with VX, a banned chemical weapon.
(With input from AP)