A suspect has been arrested after at least a dozen female sex workers were raped at gunpoint in the Los Angeles area since 2014, a law enforcement official told the Associated Press.

The official spoke to the AP on condition of anonymity, because he/she was not permitted to discuss the matter publicly before a formal announcement expected later Wednesday.

The official did not immediately provide the name of the suspect or detail potential charges.

Authorities said the suspect attacked a woman in December in Compton and had also been linked to 11 other cases that were being investigated by both Los Angeles police and the Los Angeles County sheriff’s department.

Police said the man typically solicits women for sex in the western regions of Los Angeles in the Alameda corridor.

The corridor is a 20-mile-long rail cargo expressway linking the ports of Long Beach and Los Angeles to the rail network near downtown Los Angeles, according to the Alameda Corridor Transportation Authority.

Authorities said the suspect lured his victims into his vehicle by pretending to be a customer. When the victims are in his car, the suspect then pulls out a gun, takes them to a remote area in South Los Angeles, sexually assaults them and releases them.

At a news conference in December, police said the suspect had threatened to hurt the women and in at least one case beat a victim who fought back. The victims range from 15 to 46 years old.

Detectives linked the cases in May after DNA from a sexual assault investigation matched a DNA that was on file from a sheriff’s department case in December 2014. As they began investigating, they soon found an uncommon pattern and began linking other cases.