Chinese-linked hackers accessed surveillance data meant for U.S. law enforcement after infiltrating the networks of several telecom companies, according to a statement from U.S. authorities on Wednesday.

US officials are still trying to help major telecom providers evict Chinese government-backed hackers from their networks and don’t have a timeline for when that will be done, officials said Tuesday.

China-linked spies are still lurking inside U.S. telecommunications networks roughly six months after American officials started investigating the intrusions, senior officials told reporters Tuesday.

Chinese hackers who penetrated U.S. telecoms likely haven't been fully evicted partially due to shifting tactics made in response to public disclosures, federal