"Someone is sending a lot of traffic to our network and that is causing big problems for us," operations manager Anders Gunnarsson told the news agency TT.
"We are currently trying to identify who it is that is sending this and then try to stop them, or the computers or whatever it is that is generating all this traffic," Gunnarsson said on Wednesday evening.
There is currently no information of when the problems will be allieviated. "The aim is to solve this as soon as possible, but for individual customers, there is no point trying to report it. All we can do is to ask for patience," Telia's head of information, Hans G. Larsson, told the tabloid Aftonbladet.