Police in Boston have surrounded a building in the suburb of Watertown as they hunt a teenager they suspect was involved in the bomb attack on the city's marathon.
Within the past few minutes, there have been reports of shots fired that shots have been heard in the vicinity of an apartment block which had been cordoned off.
Connecticut State Police earlier said that a vehicle believed to be linked to suspect Dzhokhar Tsarnaev has been recovered.
Authorities had said earlier that the grey Honda CRV “could possibly be occupied by” the suspect in the Boston attacks.
The Boston Police Department later tweeted that the vehicle was “found unoccupied” and was “being processed for evidence by authorities”.
UPDATE: Vehicle (MA Plate: 316-ES9) found unoccupied. Car being processed for evidence by authorities. pic.twitter.com/c4cDHrgd4E— Boston Police Dept. (@bostonpolice) April 19, 2013
Earlier, Tarmelan Tsarnaev was killed after a police chase and shootout in the Watertown area this morning.