Bahrain Telecommunications Co (Batelco) broadband customers faced "service degradation" on Internet services, the firm said on Wednesday, as the Gulf island kingdom was wracked by a third day of protests.
The telecoms operator did not specify what caused the disruption.
"We appreciate our customers' cooperation and understanding while we strive to restore full services, which we hope to do as soon as possible," Batelco said in an emailed statement.
A Batelco spokesman said technical teams were working to restore full service.
Protesters in Bahrain, inspired by revolts that have toppled Arab rulers in Tunisia and Egypt, poured into the capital to mourn a demonstrator killed in clashes with security forces.
In Egypt, access to the Internet was cut off from January 28 until February 2 in an effort to quash the pro-democracy protest movement that eventually forced long-time president Hosni Mubarak to resign.