G4S (LON:GFS) became the biggest faller on the FTSE 100 on Tuesday, after weak performance in the Middle East led the group to slash its growth forecast for the year.

The security company now expects revenue growth of between 3 and 4 percent in 2017, down significantly from a previous expectation of between 4 and 6 percent. Disappointing performance in the Middle East and India contributed to the downgrade, with G4S CEO Ashley Almanza saying:

“Trading for the nine months was in line with expectations. Organic revenue growth was 4.4 percent, with all regions growing apart from the Middle East and India region. Organic revenue growth excluding Middle East and India was 6.1 percent for the first nine months.”

The group said it remains focused on cash flow and are on track for the Group’s net debt to EBITDA ratio to be 2.5x or lower by the end of 2017.

Shares in the company plunged on the news and are currently trading down 6.69 percent at 260.90.