Washington school shooting: Students in lockdown at William Wiley Elementary as police rush to the scene

A shooting at an elementary school in Washington state elementary during dismissal has put the school on lockdown, with police rushing to the scene of the alleged suspect. 

The school district in Richland, Washington sent out an alert to parents that confirmed a shooting at William Wiley Elementary in West Richland.

At least one adult woman has reportedly been shot and killed, according to the Tri-City Herald citing a police dispatch. 

West Richland Police are reportedly searching a home on South Highlands Boulevard down the street from the school. 

'West Richland Police Department believe to know who the perpetrator and have their house lock-downed,' they told NBC. 

'The perpetrator is still at large. The district is working on the reunification efforts. Another update will be sent soon.' 

A resident said that he heard four to five gunshots while in his backyard Monday afternoon.  

'I thought it was someone hitting something with a hammer. It didn't sound like a gun. Then a woman came flying out here before the cops even got here and started screaming that someone was shot ,' Chris Worley said.

The school district sent an alert to parents, adding that any students still on campus were sent into a secure area, even those who were getting set to depart on the school bus.

'Students and staff at our schools have been moved inside the buildings and place into a critical lockdown.'

'If students were loaded on buses but still at the school, they were moved into the school building. We will update you once we have more information.'

Richland Police confirmed in a Facebook post that they were headed to the scene Monday afternoon.

'There is an active incident in the area of William Wiley Elementary and South Highlands Blvd,' they wrote. 

'Please stay clear of the area. We will post updates as they become available.'

At least one other school in the area is locked down and all after-school activities have been canceled.

DailyMail.com has reached out to the West Richland Police Department, who are handling the investigation, for comment. 

This is a breaking news story.