The FBI is searching for other possible victims in at least ten states after an Oregon woman escaped a makeshift concrete block cell.

During her kidnapping and sexual assault by a man posing as a police officer, the woman managed to escape.

Negasi Zuberi, 29, has been arrested in connection with the assault.

In the past decade, the suspect has lived in several states, and police fear he may have assaulted others.

“We are fortunate that this brave woman escaped and alerted authorities,” said special agent Stephanie Shark with the FBI Portland Field Office.

According to the FBI, he has been linked to at least four additional sexual assaults.

The woman, who has not been named, was first contacted by police in July, according to Klamath Falls, Oregon police.

During the afternoon of 15 July, she reported that Mr Zuberi approached her for prostitution services in Seattle. According to court records, he was posing as an undercover police officer at the time.

After handcuffing the woman, the suspect drove her 450 miles (724 km) to Klamath Falls, where he lives.

She said she was sexually assaulted and locked in a makeshift cell Mr Zuberi had built in his garage from concrete blocks and a metal door she couldn’t open.

After Mr Zuberi left that day, she broke down the door and escaped. In response, the woman flagged down a passing motorist who called 911 and took her to the hospital.

Mr Zuberi’s home was searched by police and a makeshift cell was discovered.

Police officers spotted him with his wife and children in Reno, Nevada, where they traced his location. The man was arrested and taken into custody.

Over the past 10 years, Mr Zuberi has lived in 10 states, including California, New York and Florida, and the FBI believes there may be more victims.

Zuberi is accused of targeting sex workers or roommates in those states, often intimidating them by spiking their drinks or posing as a police officer.

The group has appealed to any other potential victims to come forward.