Alcatraz prisoners could have lived

The three prisoners who escaped from Alcatraz in one of the most famous and elaborate prison breaks in US history could have survived and made it to land.

Three Dutch scientists, using the latest hydraulic software and information about tides on the night of the 1962 escape, said the three men could have made it to land north of the Golden Gate Bridge if they left between 11pm and midnight.

If they left before 11pm, the strong currents of San Francisco Bay would have carried them to the Pacific Ocean and death, the scientists said.

Prison officials and federal agents insisted at the time of the escape that the inmates - brothers John and Clarence Anglin and Frank Morris - perished, but their bodies were never found, continuing speculation that they survived.

"Of course, this doesn't prove that" they survived, one of the scientists, Rolf Hut, a researcher at Delft University of Technology in The Netherlands, said in a news release about the study.

"But the latest and best hydraulic modelling information indicates that it was certainly possible."

The scientists presented their findings Tuesday at the American Geophysical Union conference in San Francisco.

The three prisoners were serving sentences for bank robbery when they pulled off the escape with stolen spoons, dummy heads and a raincoat raft.

Their exploits were turned into the 1979 movie, Escape from Alcatraz, starring Clint Eastwood as Morris.

US Marshal Michael Dyke, who inherited the unsolved case in 2003, told The Associated Press two years ago he didn't know whether any of the trio was still alive. But he had seen enough evidence to make him wonder.

That evidence included credible reports that the Anglins' mother, for several years, received flowers delivered without a card and that the brothers attended her 1973 funeral disguised in women's clothes despite a heavy FBI presence.