A man and woman have been charged after an explosive device was found in Princes Street Gardens, Edinburgh, in 2018.
Officers initially made two arrests on Tuesday in connection with the incident on Thursday, January 11, 2018.
Cops have now confirmed that the 35-year-old man and 32-year-old woman have now been charged.
The pair are due to appear at Edinburgh Sheriff Court today and a report has been sent to the procurator fiscal.
Officers responding to the incident initially thought it was an "elaborate hoax" but soon discovered it was an explosive device with the potential to cause harm.
Investigators tested the suspicious package at the time and said it had proven to be dangerous.
Detective Chief Superintendent Stuart Houston, Police Scotland's Head of Organised Crime and Counter Terrorism said: “Since the discovery of the item, officers from Police Scotland’s Counter Terrorism Unit have carried out extensive enquiries, including with European partners and law enforcement agencies.
"They have been absolutely committed to this protracted and challenging inquiry to identify those believed to be responsible. This has resulted in the arrest of two people today."
Chief Superintendent Sean Scott, Police Scotland's Divisional Commander for Edinburgh, added: "Enquiries by Police Scotland are ongoing and I want to re-assure the public that the activity in Granton Road and on King George IV Bridge was pre-planned and intelligence-led.
"You will see an increased police presence, however, there is no wider risk to the community."
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