POSTED: Sunday, April 21, 2013 - 11:30pm
UPDATED: Sunday, April 21, 2013 - 11:44pm
CNN — The surviving suspect in the Boston Marathon bombings has communicated in writing with officials several times, a senior federal official, who has been briefed on the investigation, told CNN's Fran Townsend on Sunday.
Dzhokhar Tsarnaev, 19, remains in serious but stable condition with a gunshot wound to the side of the neck, a federal law enforcement source with knowledge of the investigation told CNN earlier.
It is unclear whether Tsarnaev was wounded during his capture or an earlier shootout with police that left his older brother -- the other man wanted in the bombings -- dead, said the source, who spoke on condition of anonymity.
The officials spoke on condition of anonymity because they were not authorized to release details to the media.