The Tsarnaev brothers suspected of planting two bombs at the Boston Marathon on April 15 - which killed three and injured hundreds - had plans to attack other individuals as well, authorities confirmed.

Reports that the suspects were heading to New York during the manhunt for Dzhokhar Tsarneav were unconfirmed by officials, but it has been revealed that the 19-year-old and his brother Tamerlan Tsarnaev were hoping to do more damage than they carried out.

"We have reason to believe, based upon the evidence that was found at that scene - the explosions, the explosive ordnance that was unexploded and the firepower that they had - that they were going to attack other individuals," Boston Police Commissioner Ed Davis said Sunday.

The man in a Mercedes carjacked by the brothers in the Cambridge, Mass., area gave Boston police the tip about Tamerlan and Dzhokhar thinking of going to New York. The source said about the brothers, "They were speaking in a foreign language that he could not understand. He spoke one word in English that was possibly Manhattan."

Tamerlan died late April 18 following a shootout he and his brother were involved in with police. The 26-year-old was pronounced dead at Beth Israel Deaconess Medical Center. Dzhokhar, 19, fled the scene of the shootout but was captured on April 19 after a local spotted him hiding severally wounded in a boat. He was taken to the same hospital where his brother died and is being treated for serious gunshot wounds to his throat. His is unable to speak but authorities are asking him questions and he is responding by writing his answers on paper.

Federal authorities put in a request to interrogate Katherine Russell Tsarnaev, Tamelan's widow, and on April 20 the brothers' aunt released a statement about her nephews and their innocence.