Syrian jihadists fighting for the Islamic State of Iraq and Syria (ISIS) in the country’s eastern districts have been complaining over a major and abrupt slash of their salaries and food benefits, a monitoring group reported.

According to the UK-based Syrian Observatory of Human Rights (SOHR), the group cut off monthly salaries by 50%; thus dropping it from $100 to $50. Daily food benefits were also reduced from $2 to $1.

Local activists in the ISIS-held districts of Deir ez-Zor and Mayadin told (SOHR) the slash was only applied to Syrian fighters; meanwhile, salaries of foreign jihadists increased.

The terror group lost considerable revenue sources as the US-led coalition, and more recently Russian and Syrian airstrikes, destroyed oilfields, refineries and fuel tanks used by the group.

ISIS makes most of its money by illegal oil trade, taxing the population it reign, and kidnap ransoms.

In January, the United States Department of Defense said an airstrike destroyed the group’s bank in northern Iraq, blowing up millions of cash.