Lafayette police on Wednesday arrested a 20-year-old woman in the January death of her 5-month-old daughter, whose suffocation was initially believed to have happened accidentally, Lafayette police said.

Authorities arrested Raven Senegal, 20, of Lafayette, in Alexandria on a first-degree murder warrant issued Monday in the baby’s death, said Cpl. Paul Mouton, a Lafayette police spokesman.

On Jan. 29, when detectives arrived at the hospital where the child was taken, “they were advised that the child had died from an accidental suffocation,” Mouton said in a news release.

Senegal told investigators a plastic shopping bag somehow ended up covering the baby’s head earlier that day at the infant’s home in the 100 block of Zim Circle, Mouton said.

The baby stopped breathing and was taken to a hospital, where she was pronounced dead, Mouton said.

Mouton said he couldn’t comment on how investigators believe the bag came to cover the baby’s head, but Senegal is accused of being responsible for the baby’s death.

Detectives learned about new information on Monday that lead them to issue the warrant some two months after the baby’s death, Mouton said.

Police do not expect to make more arrests in the ongoing investigation, he said.

Once Senegal arrives in Lafayette, she will be booked into the Lafayette Parish Correctional Center on a count of first-degree murder, Mouton said.