The Mossad was among more than a dozen foreign security services that helped free five Bulgarian nurses and a Palestinian doctor from life imprisonment in Libya in a long-disputed AIDS-transmission affair, Bulgaria's intelligence chief said on Monday. Gen. Kirtcho Kirov told the 24-Tchassa daily that the Mossad "put us in contact with people in Libya and across the world who had the information and influence to create a favorable psychological environment to resolve the problem," Agence France Press reported. Held in Libya since 1999, the six were initially sentenced to death after being convicted of deliberately infecting 438 children with the HIV virus, then had that sentence commuted to life imprisonment. Libya allowed the six, who always maintained their innocence, to return home last week after Bulgaria agreed to forgive millions of dollars in debts that Libya owed Bulgaria. Kirov also said a former top official at the British overseas intelligence service MI6 put the Libyan and Bulgarian intelligence chiefs in contact. The general said several Arab countries were involved, including "our Palestinian friends," Egypt, Algeria and Morocco, which "provided information and used their influence" on Libya.