Martin Salia, a surgeon from Sierra Leone who was being treated for Ebola in the U.S. has died, according to the Nebraska hospital where he was being treated, BBC reports.

Salia, who arrived for treatment in the state Saturday, had U.S. residency and was married to an American.

The Nebraska Medical Center said this morning that Salia, 44, had died. He was the second person to die from the virus in the U.S., BBC reports.

More than 5,000 people have died in the current Ebola outbreak — almost all of them in West Africa.

Liberian national Thomas Eric Duncan died in Dallas in October after coming to the U.S. to visit relatives.

“We are extremely sorry to announce that the third patient we’ve cared for with the Ebola virus, Dr Martin Salia, has passed away as a result of the advanced symptoms of the disease,” the hospital in a statement, according to BBC.

Salia worked as a surgeon at Kissy United Methodist Hospital in Freetown, the capital of Sierra Leone.

BBC said is not known whether  or not he had been caring for Ebola patients.

When Salia arrived in the U.S. and was taken to the hospital in Omaha, he was in advanced stages of Ebola with respiratory and kidney failure, BBC reports.

The Omaha unit is one of just a handful of specialty treatment centers in the U.S. Two other Ebola patients have been successfully treated there.