The source did not provide further details about the alleged plot or the circumstances surrounding its foiling.
The Homs refinery processes crude oil and is currently affiliated with the Syrian Petroleum Company (SPC). It plays a key role in supplying the domestic market with essential petroleum products, including gasoline, diesel, fuel oil and kerosene.
As of Sunday, security forces and the Ministry of Energy had not issued a detailed statement explaining how the plot was thwarted or identifying those allegedly involved.