The cause of death remained under investigation. Police said an incident report would not be available until Monday.
Delp sang on Boston’s 1976 hits ”More than a Feeling” and ”Long Time.” He also sang on Boston’s most recent album, ”Corporate America,” released in 2002.
He joined the band in the early 1970s after meeting Tom Scholz, an MIT student interested in experimental methods of recording music, according to the group’s official Web site. The band enjoyed its greatest success and influence during its first decade.
The band’s last appearance was in November 2006 at Boston’s Symphony Hall.
On Friday night, the Web site was taken down and replaced with the statement: ”We just lost the nicest guy in rock and roll.”