Nightly mobile network disruption has been detected in a Bahraini village at the centre of recent protests, an advocacy group has said.
Bahrain Watch has published a report in which it describes disruption to 3G and 4G networks in the village of Duraz.
Anti-government protests have been held in Duraz, which is home to Shia Muslim cleric Sheikh Isa Qassim.
Sheikh Qassim's citizenship was recently revoked by the Bahraini government.
Phone calls and SMS messages functioned normally during tests by Bahrain Watch, but data services were not available.
"Our experiments show that between 19:00 and 01:00 certain 3G and 4G cell towers belonging to Batelco and Zain appear to be turned off," Bahrain Watch notes in its report, "and 2G cells broadcast notifications to phones, indicating that mobile data services are not supported."
Fixed line connections were also investigated.
Bahrain Watch sent pings - basic data requests - to IP addresses within Batelco's network.
Roughly 12% of IP addresses had been disrupted for three nights in a row during these tests in July, the group said.
