At least 32 terrorists and five security persons were killed during fierce clashes in a Pakistani tribal region, an official statement said on Friday.Five terrorists were killed when they clashed with security forces in Tirah Valley of the Khyber Agency on Friday, an Inter Services Public Relations release said.On Thursday five soldiers, including an officer, were killed in clashes with terrorists. During these clashes, 27 terrorists were killed, said the release.During the ongoing military operation -- Khyber II -- security forces have achieved a huge success, said the release.