The incidents came following rallies in support of the president’s baseless claims that he won a second term, which also led to dozens of arrests, several stabbings and injuries to police officers.

The hacks were revealed just days after cybersecurity firm FireEye disclosed that foreign government hackers had broken into its network and stolen the company’s own hacking tools.

He was a spy turned novelist who became the pre-eminent writer of espionage fiction in English.