Mother's Day bomb plot by teenage terrorist foiled in Melbourne

Police have foiled a Mother's Day terror plot after they arrested the teenage son of a doctor in Melbourne and a 14-year-old boy in Sydney on Friday.

Counter-terrorism sources say the young extremists behind the plot were about to detonate three 'improvised explosive devices' - known as IEDs - in Melbourne on Sunday.

Bomb squad officers removed a number of home-made devices from a home in Greenvale, a quiet suburb north of Melbourne. The Sydney raid was more low-key because of the age of the suspect, according to The Herald Sun.

The devices were taken away by Victoria Police's bomb squad and were destroyed in 'controlled detonation... to dispose of these devices'. The first device was detonated about 8:30pm, according to Victoria Police.

The bombs were be detonated at a nearby reserve, after a 300 metre exclusion zone set up around the site.

According to reports, the arrested teen regularly spoke about ISIS on his Facebook page, branded the United States terrorists, and said those who don't pray five times a day are not Muslim.

He also posted long rants about the current situation in Syria, with some coming just hours before he was arrested.

Australian Federal Police and Victoria Police carried out the high-level joint operation in Melbourne's northern suburbs on Friday afternoon, arresting one man and detaining six women.

Balaclava-clad officers with assault rifles swarmed a two-storey home in Greenvale about 12:30pm, ordering the occupants out of a house.

A man left the house and surrendered to police, before six women emerged from the property a short time later.

The bomb squad was called in shortly after police arrived, and it has remained at the scene all afternoon.

Victoria Police did not have any additional information on the raids, and said it was related to an 'ongoing investigation'.

Witnesses said officers arrived in a 'heavily-armed vehicle' and 'demanded' people leave the house in Greenvale.

There was a strong police presence throughout the afternoon in the suburb of Coolaroo, according to reports.

On Thursday, police introduced new rules for officers, which mandates they cannot work alone, must wear bulletproof vests and carry weapons during work hours.

It is unknown whether the incident is related to recent anti-terror raids in Victoria.