Authorities were unable to establish contact with the Tugberk Imamoglu and its 10 crew members Two Turkishflagged commercial vessels collide off Istanbul contact lost with Key points and original sources are listed below.

• Authorities were unable to establish contact with the Tugberk Imamoglu and its 10 crew membersS1

• Two Turkishflagged commercial vessels collide off Istanbul contact lost withS2