Homes and cars in a number of Newcastle streets have been damaged in a series of explosions in the early hours of Sunday morning.
Three letterboxes were destroyed, and the windows of two homes and cars damaged in the blasts heard in Merewether and Bar Beach about 4.20am.
About two hours later, residents from another Merewether street found a suspicious item in their letterbox.
The item was removed safely by police and no one was injured.
Anyone with dash cam vision from Dent, Mitchell, Livingstone and Kilgore streets at Merewether is urged to contact Crime Stoppers on 1800 333 000.
© AAP 2019