MOUNTAIN VIEW -- Police arrested more than 100 people at a Shoreline Amphitheater rave concert over the weekend, but as of Sunday night had reported no major medical emergencies.

The Beyond Wonderland concert attracted about 40,000 fans over two days, Mountain View Police Lieutenant Chris Hsiung said. Most of those arrested were charged with furnishing or using illegal drugs such as Ecstasy, LSD and the depressant GHB; police also arrested some people for drunkenness and others wanted on outstanding warrants, Hsiung said.

The goal was to interdict as many drugs as possible to keep the concert safer, he said. "We're just happy and thankful that it's continued to be a safe operation," he said. On Saturday, "we make it through without any major medical issues."

The Santa Clara County Sheriff's Department transported those arrested to Santa Clara County Jail.

Officers from Sunnyvale and Palo Alto assisted Mountain View Police at the concert, which was limited to those 18 and over. Two hours before the concert's 11 p.m. scheduled end, police had made 55 arrests on Sunday, but the number was steadily growing, Hsiung said.

Three years ago, two people died of drug overdoses at a Memorial Day rave at the Cow Palace. Several months later, more than a dozen people attending a rave there fell ill because of suspected drug and alcohol use and were sent to hospitals.

Several years ago, two people died of overdoses in connection with a similar music party at the Cow Palace.

Contact Sharon Noguchi at 408-271-3775. Follow her at Twitter.com/NoguchiOnK12.