Australian police said on Saturday a 17-year-old teenager has been charged after a raid on a house in the Greenvale city of Melbourne with plotting terrorism act on Mother’s Day.
Police said they found explosives at the house of the teenager who is believed to be engaged in an act preparation for, or planning, a terrorist act.
Australian Prime Minister Tony Abbott stated that his government was aware of a very serious threat to his country.
"There have been some raids over the last 24 hours in Sydney and Melbourne. There's been at least one arrest," Abbott said.
"There is evidence of a bomb plot that was in a reasonably advanced state of preparation and the police will have more to say about this."
Police also announced another teenager, 14-year-old, has been arrested in a similar raid in Sydney on the same day.
Officials said the teenager is expected to face a closed trail on Monday, but his identity would not be released.
Australian Federal Police Deputy Commissioner Mike Phelan told reporters that there was no imminent threat to the community and added that he would not confirm that the alleged attack plan was aimed at Mother’s Day.
"We're sifting through a lot of information ... we can't confirm exactly when any event was going to take place," said Phelan.
Australia is on high alert for terrorist attacks by home-grown militants due to the country’s alliance with the United States against ISIS in Syria and Iraq. Officials say there are dozens of militants who returned from fighting in the Middle East.