A "suspected chemical incident" in central London led to about 100 office workers being evacuated from their buildings.
Firefighters were called to London Wall in Moorgate shortly before 3pm and a 100m stretch of road, between Moorgate and Old Broad Street, near Liverpool Street station, was cordoned off by police.
The London Fire Brigade later said the incident was caused by Aamonia leaking from a fridge in an office.
Police said around 4.30pm that the road had since reopened.
Paramedics treated two people at the scene, but a London Ambulance Service spokesman did not disclose what injuries they had suffered.
A spokesman told the Evening Standard: “We were called at around 3.31pm this afternoon to reports of a chemical related incident at an address on London Wall.
"The incident is still in progress.
“We have already sent a number of resources including an ambulance crew, our hazardous area response team and an incident response officer.
“We are currently treating two patients at the scene."