2:45 p.m. (EST): The Boston Police Department has announced that "there has not been an arrest in the Marathon attack." Investigations are ongoing.
2:35 p.m.: CNN is retracting their previous report that an arrest has been made in the Boston Marathon bombings. Other sources are reporting that officials are close to identifying a suspect after reviewing area surveillance video, but no arrests have been made.
12:45 p.m. (EST): FBI spokesman Paul Bresson has confirmed that the substance found in the letter to the president was ricin.
The Secret Service says that a letter containing a suspicious substance and addressed to President Obama was received on Tuesday at a White House mail facility. This comes just after a letter sent to Senator Roger Wicker (R.-Miss.) was found to contain the poison ricin.
9 p.m. (EST): The final press conference of the day with Massachusetts Governor Deval Patrick, Boston Police Commissioner Ed Davis and various other officials just concluded. The FBI is now leading investigations of the events. Davis confirmed that three people were killed in today's blasts.
CNN is reporting that one of the victims killed was an 8-year-old boy. The Wall Street Journal had reported that as many as five other unexploded devices were found around Boston, but investigators now doubt that they were actually bombs.
It's a busy weekend at the movies. Comedy, action, animated fare for the kids—a solid mix for a good range of audiences, those of you who aren't sitting in front of the TV watching March Madness, that is.
Starting this summer, you won't be getting any mail on the weekend.
On Tuesday afternoon, a man in Dale County, Alabama, near Midland City, got on a school bus, demanded a child be let off with him, then shot and killed the bus driver when he refused. The shooter, identified as Jimmy Lee Dykes, then took the boy from the bus and is currently holed up with him in an underground bunker nearby.
For the first time, women in the armed forces will be moved into combat roles. Secretary of Defense Leon Panetta will make the official announcement Thursday.