SACRAMENTO, CA (AP) - Prosecutors have released details of the explosive materials they say were found after a chemistry researcher at the University of California, Davis was injured in an explosion in his apartment last month.

The Sacramento Bee reports that during a hearing Friday, Yolo County prosecutors said several common explosives were recovered in the apartment of David Snyder, including nitroglycerine.

The 32-year-old Snyder - who suffered hand injuries in the Jan. 18 blast at his campus apartment - is being held in lieu of $2 million bail on explosives charges in connection with the explosion.

Prosecutors have also added several firearms charges - including charges for weapons investigators say were recovered from the apartment - as well as what Yolo County prosecutors described as "multiple boxes of ammunition" found in the apartment.

Snyder has pleaded not guilty to the charges.

WOODLAND, CA - A man who prosecutors said told drug agents he was hired by Richmond drug dealers to guard a marijuana crop being grown on public land in the county was convicted marijuana cultivation and possession for sale charges.

Fidel Alvarez, 47, was also found guilty of being armed with a firearm in connection with the crimes, the Yolo County District Attorney's Office reports.

Alvarez was arrested walking through the nearly mature marijuana crop found just off Highway 16 on Sept. 6, 2012. He was dress in camouflage and armed with a .22 calibre rifle with a flash suppressor, according to court documents.

There were 500 pot plants in the field, county narcotics enforcement agents said.

During Alvarez's trial, experts valued the marijuana at $250,000 to $500,00 on the street.

Drug agents testified that Alvarez told them that in return for his services, the drug dealers promised him a percentage from the street sales of the pot.

FAIRFIELD, CA - Two suspects broke into a Fairfield school Wednesday night, tied up the custodian and stole school iPads at gunpoint.

The 50-year-old man was walking outside from one building of Sem Yeto Continuation School to another around 9:52 p.m. when he was approached by two men. Fairfield police said the suspects, one with a handgun, forced the man to lie on the ground and threatened to kill him if he did not cooperate.

The suspects demanded to know where the school kept its iPads. After the custodian gave them the location, the suspects duct taped the man's hands and then taped him to a desk. The suspects then went to where the iPads were stored, stole about 40 iPads and then ran away from the school.

Police said the custodian was able to free hands and called police. When officers arrives on scene, the custodian was still partially taped to the desk.

The custodian was not injured in the robbery.

The suspects were described as: