Boston bomb suspects originally planned July 4 attack

WASHINGTON (Reuters) - The brothers suspected of the Boston Marathon bombings had originally planned to carry out the attack on July 4 this year, a law enforcement official said.

But the Tsarnaev brothers decided to strike earlier because they completed building their bombs more quickly than expected, the official said.

(Reporting by Mark Hosenball; Editing by Alistair Bell and Eric Walsh)