(CNN) — Several US mobile carriers experienced technical difficulties Monday night.
DownDetector, a website that tracks service problems and outages, indicated that AT&T, T-Mobile, Verizon and Boost Mobile all experienced a spike in reports Monday night.
It was unclear if the problems were connected.
Neville Ray, president of technology for T-Mobile, tweeted late Monday that the company was “addressing a 3rd party fiber interruption issue that has intermittently impacted some voice, messaging and data services in several areas.”
Ray later tweeted that T-Mobile had “seen significant improvement and [is] operating at near normal levels.”
It was unclear which geographical areas were affected by the issues.
AT&T, Verizon and Boost Mobile could not be immediately reached for comment.
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