Weiland said he will undergo rehabilitation

Weiland was arrested last month for cocaine and heroin possession in Burbank, California, after the car he was in was stopped by police.

Court officials said on Monday the 35-year-old singer said he would enter a drug rehabilitation programme to try and deal with his persistent drug problems.

He was scheduled to appear in court again on 11 July so that a preliminary hearing could be set.

Weiland was arrested on 17 May after police stopped a car he was travelling in and noticed drug paraphernalia in the vehicle. Both Weiland and the car's driver, 29-year-old Jennifer Lynn Sires, were released on $10,000 (�6,280) bail.

Grunge star

"Officers made a traffic stop in a closed business district. They searched the car because they saw a syringe and found narcotics," he said.

Weiland was jailed in 1999 for violating his probation after being convicted of heroin possession in 1998.

He had been one of the biggest stars of the US grunge music scene in the early 1990s.

The Stone Temple Pilots' 1992 debut album, Core, sold three million copies, while the follow-up, Purple, went to number one in the US two years later.

Their latest release, 2001's Shangri-La Dee Da, was hailed as a return to form.

Weiland recently formed a new band, Reloaded, with former Guns 'n' Roses members Slash, Duff McKagan and Matt Sorum. They are due to release an album next year.

He also mounted a solo career in the late 1990s, releasing the highly-acclaimed album 12 Bar Blues, in 1998.