The Coast Guard, along with state and local rescue teams, is searching for survivors after an apparent collision involving three vessels that occurred in the Elk River, off the Chesapeake Bay in northern Maryland, early this morning. The vessels A/V Kastner, Buchanan 14, and Swift, were involved in an apparent collision on Monday morning. The tugboat Swift apparently sank while the A/V Kastner and tug Buchanan reportedly went aground. Rescue crews transported two injured crewmembers to Union Hospital in Cecil County, Md., and one injured crewmember was flown to the Shock and Trauma Center in Baltimore. The extent of the injuries is unknown. Two others apparently made it to shore in good condition.