Several users in the UAE have complained on social media that they could not access their home internet on Thursday evening.
Down Detector, an internet tool, noted that some Etisalat services were interrupted at around 9.30pm.
People in Dubai and Abu Dhabi were affected the most, its Live Outage heat map showed.
Landline services were affected the most, according to Down Detector.
Du tweeted to say that its services were not affected.
Etisalat posted on Twitter about the outage shortly after midnight.
"Currently, the Internet service is experiencing a technical problem. We apologise for any inconvenience you may encounter with some apps, as we are working with the relevant authorities to resolve the issue," said the statement.
About 90 minutes later, the telecommunications company said the issue - caused by a "technical glitch" - had been resolved.
"It has been determined that all internet services are now back to normal after our technical teams were able to fix the issues resulting from the technical glitch that caused partial disruption to our network during the past few hours. Our gratitude and appreciation goes out to our customers for their understanding."