The Scottish Parliament was evacuated after a suspicious package containing white powder was sent to an MSP.
Police in Edinburgh said they were called to Holyrood at about 11.35am, and the building was evacuated as a precaution.
The MSP building remains closed but other areas of the campus are open.
A source at the parliament said the incident involved three similar envelopes and that one was believed to contain white powder.
According to James Matthews, the alarm was raised after staff of Conservative MSP Jamie Halcro-Johnstone opened the mail. He was not there are at the time.
Emergency services are still at the scene.