A 14-year-old boy in Blackburn has been arrested in connection with an alleged terrorist plot in Australia.
Greater Manchester Police said the teenager is accused of the commission, preparation, or instigation of acts of terrorism. He remains in police custody for questioning.
The arrest arrived after five people were held in Melbourne accused of preparing a terrorist attack at the 100th anniversary of the Anzac Day commemoration event on 25 April.
Police assured there is no immediate threat to residents of Lancashire or the rest of the UK.
Det chief supt Tony Mole, from the North West Counter Terrorism Unit, said: "We have uncovered communication between an individual in the North West and a man in Australia to what we believe is a credible terrorist threat.
"As soon as this information came to light we acted quickly with the relevant authorities here and abroad and this has resulted with officers from the NWCTU arresting a teenager.
"The nature of the communication is currently under full assessment and subject to investigation.
"We are continuing to work closely with the police in Australia and Lancashire and I want to reassure the public that we have not uncovered an imminent attack in the UK and there is no immediate threat towards the communities of Lancashire, the North West and the UK.
"It is important to remind communities and families to bring to our attention anyone they perceive may be vulnerable or in danger of escalating towards terrorism. We have the ability to engage and support individuals where necessary."