OAKLAND -- An 18-year-old Oakland man, who will be prosecuted under three strikes statutes, and four other people including two juveniles, have been charged in a violent robbery last week where an 86-year-old woman was dragged on the ground before giving up her purse, authorities said Wednesday.

The potential three-striker, Gary Nelson, who turns 19 on May 26, is charged with two counts of robbery, one count of attempted robbery and one count of elder abuse. Officials said it is rare, but not unheard of, for an 18-year-old to be prosecuted under three strikes, which could mean life in prison if he is convicted.

Also charged with the same counts are Raheem Hill, 20, Marney Causey, 20, and two boys, ages 14 and 15. They all live in Oakland. The three adults are being held in lieu of bails ranging from $175,000 to $680,000 and are scheduled for a pretrial hearing May 22. The juveniles also remain in custody at Juvenile Hall. The date of their next court appearance was unavailable.

Hill is also charged with three counts of possession of stolen property because items taken in an Oakland burglary the day before in the Temescal district were found on him, Officer Anwawn Jones said.

The five were arrested Thursday afternoon moments after the 86-year-old woman and her two daughters, ages 60 and 57, were robbed near Glenview and Warfield avenues several blocks from Lake Merritt in the Grand Lake area.

The five admitted their involvement, authorities said.

Jones said the five were driving in the area looking to rob people and decided to target the three women.

Hill, who was driving, waited in the car while the other four confronted the women and took various items from them, including a laptop computer. When the 86-year-old woman resisted giving up her purse, she was knocked down and dragged several feet before letting it go, Jones said.

The five drove off but were stopped by Piedmont police a few blocks away. The items taken from the women were recovered as ¿were items from the earlier burglary, Jones said.

Authorities said Nelson has two prior robbery convictions that make him eligible for prosecution under three strikes statues. One occurred last month in San Francisco and the other was in 2010 in Alameda County when he was 16.