Iran is establishing a permanent military base inside Syria, a Western intelligence source has told the BBC.
The Iranian military is said to have established a compound at a site used by the Syrian army outside El-Kiswah, 14 km (8 miles) south of Damascus.
The report comes amid growing tensions over Iranian influence in Syria and across the region.
Israeli PM Benjamin Netanyahu recently warned that Iran wanted to establish itself militarily in Syria.
“Israel will not let that happen,” he said.
Satellite images commissioned by the BBC seem to show construction activity at the site referenced by the intelligence source between January and October this year.
The images shows a series of two dozen large low-rise buildings – likely for housing soldiers and vehicles.