A pregnant U.S. citizen went to the hospital after immigration agents detained her

Cary López Alvarado, who's nine months pregnant, said that after being released from immigration custody Sunday she experienced sharp stomach pains and was hospitalized.

A 28-year-old pregnant woman set to give birth as early as next week is speaking out about being detained by immigration authorities in California, even after telling agents she was a U.S. citizen.

Cary López Alvarado lost her balance as agents "shoved her" during her arrest over the weekend, she tearfully told NBC Los Angeles on Monday from a hospital bed. “That’s when I kind of leaned forward, trying to protect the stomach.”

López Alvarado told Telemundo 52, NBC’s sister station in Los Angeles, "I was afraid that they were going to hurt me."

After being released Sunday, López Alvarado said she started experiencing sharp pains in her stomach and was hospitalized. With just one week left before her due date, her doctors said they are monitoring López Alvarado as well as her baby, NBC Los Angeles reported.

Masked men wearing Border Patrol uniforms pulled up to a building’s private parking in the city of Hawthorne in marked U.S. Customs and Border Protection vehicles on Sunday, after following a white pickup truck with two undocumented workers, one of which is López Alvarado’s partner.