Polish prosecutors are investigating a possible Polish link to a weekend bombing in the Norwegian capital Oslo that killed seven people but they have not charged or detained anybody, a spokeswoman said on Monday.
"We are carrying out actions at the request of the Norwegian police into potential links, but for the good of the investigation we cannot reveal any details," Malgorzata Klaus a spokeswoman for the prosecutor's office in the southwestern city of Wroclaw, told Reuters.
Polish public television said police were questioning the owner of an Internet-based chemical trading company in connection with the Norwegian bombing. It also said they had searched one of his warehouses in Wroclaw.
Poland's domestic security agency was scheduled to hold a news conference at 1200 GMT.