Britain and America's intelligence services had a list of surveillance targets that included the office of the Israeli Prime Minister, German government buildings and a top European Union official, according to documents leaked by whistleblower Edward Snowden.
Foreign leaders including African heads of state and their family members, directors of the United Nations, officials overseeing oil and finance ministries all had their communications monitored by Britain and the US, according to the secret documents.
The documents chronicle NSA's and GCHQ's eavesdropping from 2008 to 2011.
More top news
Several people are thought to have been hurt and the suspect has been wounded.
Hashem Abedi’s trial, which was due to start next month, was also delayed until the New Year.
All UK flights to the Red Sea resort have been banned since November 2015 following the bombing of a Russian airliner.