AMMAN, Jordan — King Abdullah II of Jordan moved quickly to block a recent increase in fuel prices after angry protesters took to the streets over the weekend, raising the specter of renewed social and political unrest in the cash-poor kingdom.

Already shaken by protests inspired by other revolts in the region, Jordan, a country of six million, is now contending with an influx of refugees from Syria, putting further strain on the country’s finances and stability.

The Jordanian government had mandated a 10 percent increase in the price of 90-octane gasoline and diesel fuel as part of an effort to reduce the subsidy burden on the state budget, in line with International Monetary Fund recommendations. The increase went into effect on Saturday.