Van Halen have postponed 17 more concert dates so that guitarist Eddie Van Halen "can continue medical tests to define a course of treatment," the band announced late Monday on its Web site. The post noted that Eddie remains "under doctors' care"; the band postponed several dates last week due to his unspecified "medical tests." No further information about the guitarist's condition was offered.

The postponed dates include Charlottesville, Virginia; East Rutherford, New Jersey; New York, New York; Duluth, Georgia;
Pittsburgh; Providence, Rhode Island; Uncasville, Connecticut; Atlantic City, New Jersey; St. Louis; Columbus, Ohio; Rosemont, Illinois; Grand Rapids, Michigan; Milwaukee; Manchester, New Hampshire; Hershey, Pennsylvania; Raleigh, North Carolina; and Baltimore.

The tour is to resume April 19 in Las Vegas, the site said, with rescheduled dates to be announced shortly. Fans are advised to retain their tickets as they will be honored at the rescheduled concerts, or ticket refunds will be issued at the original point of purchase.

Last week, tour promoter Live Nation issued a statement that read, "According to Eddie Van Halen's physician, he is undergoing a battery of comprehensive medical tests to determine a defined diagnosis and recommended medical procedures."

A spokesperson declined to elaborate on the medical condition that has sidelined the guitarist, whose stint in a rehab facility last fall delayed the long-awaited reunion with founding vocalist David Lee Roth.