A Brooklyn mother, apparently upset when her baby wouldn't stop crying, slashed him across the throat yesterday and then plunged a knife into her own leg, police told The New York Post.
Cops took Tineka Johnson, 29, into custody after responding to an early-morning 911 call at her East Flatbush home.
She was charged with attempted murder and criminal possession of a weapon.
The baby's grandmother reported the incident on East 38th Street, and Johnson was taken away without incident, authorities said.
The 5-month-old boy was rushed to Kings County Hospital a block away where officials said he was in stable condition yesterday.