Obama hints at NSA shake-up after Snowden revelations

Israel's Prime Minister Benjamin Netanyahu has reacted angrily to allegations that the United States spied on Israel's leaders. He said on Monday such activity was unacceptable and had no place in the allies' close relationship.

Documents leaked on Friday by former U.S. National Security Agency contractor Edward Snowden showed the NSA and its British counterpart GCHQ had in 2009 targeted an email address listed as belonging to then-Israeli Prime Minister Ehud Olmert and monitored emails of senior defence officials.

Mr Netanyahu did not elaborate on whether Israel intended to ask Washington for clarifications.

Nick Harvey from aid organisation Doctors of the World, which was allegedly targeted by GCHQ, told ITV News: "We're completely shocked and surprised by these allegations of secret surveillance.

"Our doctors, nurses and midwives are by no stretch of the imagination a threat to national security so we have no idea why they would target an organisation like ourselves."

Watch: President Obama under pressure to reform NSA

The latest allegations about the extent of British and US spying are fuelling the debate about surveillance - with reform of the US National Security Agency appearing inevitable.

President Barack Obama told a press conference that "trust had been diminished" and it was important to take that into account when weighting up how the US "structures these programmes."

Read: GCHQ and NSA targeted Israeli PM and German government

The revelation that Britain and America had a list of surveillance targets which included the Israeli Prime Minister, a European Union commissioner and various charities, has prompted an angry response.

The European Commission issued a statement saying the claims "deserve our strongest condemnation" if proved true.

"This is not the type of behaviour that we expect from strategic partners, let alone from our own member states," it said.

Unicef and Medecins du Monde were among the organisations listed in the latest batch of secret documents leaked by fugitive Edward Snowden to be published by the Guardian.

Leigh Daynes, an executive director of Medecins du Monde in the UK, told the Guardian he was "shocked and surprised by these appalling allegations of secret surveillance on our humanitarian operations".

Read: GCHQ and NSA targeted Israeli PM and German govt

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.

The documents, published by The Guardian, The New York Times and Der Spiegel, revealed that GCHQ and NSA had more than 1,000 surveillance targets in 60 different countries.

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.