Internet connectivity in Iran rose "very" sightly, monitoring group NetBlocks said on Saturday, more than 200 hours into a nationwide internet shutdown during protests against authorities.

"Metrics show a very slight rise in internet connectivity in Iran this morning after the 200 hour mark," Netblocks said on X, but added that connection was only around 2 percent of ordinary levels and there was no sign of "a significant return".

Protests in Iran have subsided after a crackdown that has killed thousands, monitors said Friday, a week after the start of the largest demonstrations in years challenging the country's theocratic system.

Demonstrations sparked by economic grievances started with a shutdown in the Tehran bazaar on December 28 but turned into a mass movement demanding the removal of the clerical system that has ruled Iran since the 1979 revolution.