Verizon customers were reporting widespread service disruptions around the country Wednesday morning, experiencing problems making outgoing calls, texting and browsing the internet.

On social media, customers using the hashtag #verizon and #verizonoutage reported that when they tried to make outgoing calls, they received the message: “All circuits are busy. Please try your call again later.”

It was not clear what caused the disruptions or whether it was related to the winter storms that have swept across large areas of the country.

“Overnight some wireless customers experienced a dialing error when placing calls from their wireless phone to a long-distance landline number,” Chris McCann, a Verizon spokesman, said in a statement. “This issue was resolved at 6:30 a.m. ET. We apologize for any inconvenience.”