KARACHI- Four of the six hijacked Pakistani crew members of the cargo vessel Morning Glory, including the captain of the vessel, arrived in Karachi today from Libya.Earlier, the Pakistani crew members had been handed over to the embassy in Tripoli after their rescue from the Libyan rebels by the US forces. The vessel and the crew had been taken over by the Libyan rebels. Talking to media persons in Karachi, the released crew members thanked the government for its efforts for their safe return to the homeland. They said the Pakistani embassy in Tripoli and the Foreign Office officials greatly helped them. They said the Libyan rebels wanted to use them for their political purposes.