Three people have been killed in a shooting at an office park in the Maryland community of Edgewood, a deputy with the Harford County sheriff's office said.

Harford County Sheriff Jeffrey Gahler told reporters this morning that the suspect was still on the loose and police are looking for him.

The shooting took place inside a business complex at Emmorton Business Park in Edgewood.

"Multiple injuries reported," the Harford County Sheriff's Office tweeted earlier.

Further details are awaited.