Here is what BBC News is saying:
Some UK think tanks were hacked by China-based groups last year, a US cyber-security company which said it investigated the breaches has claimed.
Crowdstrike said it saw the repeated targeting of think tanks specialising in international security and defence issues, beginning in April 2017.
The group also investigated a breach of the US Democratic National Committee, allegedly by Russian hackers, in 2016.
The BBC understands that not all of the UK think tanks targeted were breached.
A number of think tanks contacted by the BBC declined to comment - although Crowdstrike said it was called in by some to respond to hack attacks.
It attributes the attacks to groups they call "Panda", which Crowdstrike said are based in China and linked to the Chinese state.
Dmitri Alperovitch, Crowdstrike's co-founder and chief technology officer, told the BBC that a number of think tanks that work on Chinese policy were targeted "very aggressively".
He said those behind the attacks were trying to steal reports - but also any information about connections to government.
"They do believe the think tanks are very influential both in the US and UK," he said.
"They believe that they may have access to information which is not public.
"In some cases [that] can be true, because you do have a lot of informal channels that these think tank people will have with government officials."
Here is a recent Think Tank Watch piece about how China reportedly targeted think tanks in the US doing military research.