Jane Onyanga-Omara, and Kevin Johnson

USA TODAY

The wife of the gunman who killed 49 people at the Pulse gay nightclub in Orlando could soon be charged in connection with the mass shooting, according to media reports.

A federal grand jury has been convened and could charge Noor Salman, the wife of Omar Mateen, as early as Wednesday, Reuters reported.

Fox News said that prosecutors are seeking to charge Salman as an accessory to 49 counts of murder and 53 counts of attempted murder, failing to notify law enforcement about the coming attack and lying to federal agents.

Salman, 30, met Mateen online and they married on Sept. 29, 2011, the Associated Press reported. The couple has a 3-year-old son.

Salman, who has Palestinian roots, grew up in the small suburb of Rodeo, Calif., about 25 miles northeast of San Francisco, the AP said.

Pulse patrons: Mateen hung out at the club 'for years'

Salman feared that Mateen, 29, was planning an attack and sought to dissuade him from going forward, a federal law enforcement official said Tuesday.

In interviews with federal investigators, Salman also allegedly acknowledged driving Mateen to the Pulse nightclub at least once before her husband launched the assault, according to the official who was not authorized to speak publicly.

Pulse owner, workers vow to reopen nightclub

The attack, the deadliest mass shooting in U.S. history, left 49 dead and 53 others wounded. Mateen was shot dead by police after a standoff.

Salman allegedly told investigators that she drove Mateen to Pulse, a popular gay club in Orlando, about a week before Sunday's shooting, suggesting that the gunman had identified the target for some time before moving forward.

The development was first reported Tuesday by NBC News.