HERCULES -- Residents in Hercules are being advised to keep their windows shut despite the recent hot weather -- and even when they're home -- after a spate of recent burglaries spiked Monday, when five homes were targets in a 7-hour period, police said.

No arrests were made after homes on four streets were burglarized between 11 a.m. and 3 p.m., according to Hercules police Officer Connie Van Putten. A fifth home was invaded around 6 p.m., she said.

The invasions bring to 12 the number of burglaries in Hercules this month. Only two occurred in April 2012.

"At least three of them have been at night, when people are usually home. That's troubling to us," Van Putten said. "It's vital that people keep their windows closed and their doors locked even when they're home."

It appears that at least four males were involved in at least three of the Monday burglaries and perhaps four, Van Putten said. A Honda Odyssey later found to be stolen out of San Francisco was seen at one of the burglaries by a neighbor, who noticed a male go into a backyard and then into the home, Van Putten said.

That tip, during a burglary sometime around 2 p.m. in the 100 block of Goldenrod Drive, led police to the area, where they spotted the vehicle and four males inside, Van Putten said. Officers then tried to pull over the vehicle, which instead accelerated and led police on a pursuit going between 40 and 60 mph through city streets and onto westbound Interstate 80, Van Putten said.

After the pursuit was halted at Macdonald Avenue for safety reasons, police found the vehicle close to John F. Kennedy High School on Cutting Boulevard in Richmond, Van Putten said. None of the four males in the car were located.

"The alertness by that resident is the reason we were so close to catching those who are involved," Van Putten said. "So we're advising all our residents to be vigilant.

"If you see vehicles that are unfamiliar or look like they don't belong in your neighborhood, call police. If something looks strange or odd, call."

Earlier, homes in the 1900 block of Redwood Road, the 1400 block of Partridge Drive and the 100 block of Lilac Drive were invaded, Van Putten said. During their investigation, police recovered a stolen handgun among a handful of items on Redwood Road that were presumed to be tossed from the Odyssey, Van Putten said.

A fifth house, in the 200 block of Newbury Drive, was targeted just before 6 p.m. and appears to be the one incident not tied into the other four, Van Putten said.

All five of the homes were two-story residences and all were entered through bedroom windows, Van Putten said. Small electronics items, jewelry and cash were the main items taken from each, she said.

Rick Hurd covers crime. Contact him at 925-945-4789 and follow him at Twitter.com/3rdERH.