Norway’s Gjoea oil and gas field will remain shut until the source of gas leak that forced operator Engie to halt production on June 21 has been found, the French company said.

“Production will remain shut until the cause of the leak has been found,” an Engie spokeswoman said, adding that 19 people had been evacuated from the Gjoea platform while 30 remained on board.

“The situation quickly came under control, and no injuries are reported,” the company said in a statement.

In April, the field’s daily output of natural gas averaged 12 million cubic meters, crude oil output stood at 17,000 barrels per day (bbl/d) and natural gas liquids at 38,000 bbl/d, according to Norway’s Petroleum Directorate.

Engie holds a 30% stake in the field, while Norwegian state firm Petoro holds 30%, BASF unit Wintershall holds 20%, and Shell owns 12%. DEA has an 8% stake.