The Bronx District Attorney’s Office declined to prosecute a city correction officer accused of raping a teenage acquaintance, authorities said Wednesday.

Officials made the decision not to prosecute the case against 27-year-old Christopher Sierra after determining there was insufficient evidence to prove he “committed the crime charged beyond a reasonable doubt,” said spokeswoman Patrice O’Shaughnessy.

Sierra was arrested around 1:15 a.m. Tuesday for allegedly attacking the 19-year-old woman inside a Bronx apartment around 2:30 a.m. Monday, police said.

The woman told cops Sierra raped and sexually assaulted her despite her repeatedly telling him “No” and trying to push him away, according to authorities.

Police charged Sierra with rape and a criminal sex act, cops said.

Sierra was initially suspended from his job following his arrest, according to a Department of Correction spokesperson, but the suspension was later lifted following the DA’s decision.

He started with the DOC in June 2016 and is assigned to Rikers Island’s Anna M. Kross Center, according to the spokesperson.