Scuffles broke out before dawn Tuesday between police and anti-establishment vagabonds who assemble each year near the 4,000-year-old Stonehenge monument on midsummer's day.

Wiltshire police said scores of vagabonds hurled steel poles, beer cans, stones and bottles in an attempt to break through police lines surrounding the archaeological site, but were quickly driven back.Seven police officers and two vagabonds were injured and about 40 arrests were made for breach of the peace, police said.

More than 1,000 helmeted police armed with riot shields and truncheons were on duty to stop an invasion by an estimated 4,000 vagabonds.

The arrests were made about one hour before 60 white-robed, modern-day druid sun worshipers celebrated the summer solstice.