A police officer patrols outside St Peter’s Square, in Rome. Islamic extremists arrested on Friday  may have   planned an attack against the Vatican in 2010. Photograph: AP Photo/Gregorio Borgia

Italian police on Friday arrested 10 people and were looking for eight others suspected of belonging to an armed group linked to al-Qaeda which had pl(...)

Cagliari chief prosecutor Mauro Mura told reporters that as well as planning to launch attacks in Pakistan and Afghanistan, as earlier reported, the suspects may also have been aiming to target the Vatican. Photograph: Osservatore Romano/EPA

Suspected extremists being questioned in a counter-terrorism investigation in Italy may have been planning an attack against the Vatican, one of the p(...)

US president Barack Obama delivers a statpment in  White House in  on Thursday in which he apologised for a counterterrorism operation in January that accidentally killed two aid workers held hostage by al Qaeda. Photograph: Jonathan Ernst/Reuters

US president Barack Obama expressed his “deepest apologies” on behalf of his government over the killing of two aid workers, an American and an Itali(...)

The White House acknowledged on Thursday two hostages held by Al Qaeda were accidentally killed in an American government counter-terrorism operation in January and said President Obama takes full responsibility. One of the hostages, Warren Weinstein, an American held by Al Qaeda since 2011, is seen in an image from a video released by his captors in 2013. Photograph: New York Times

One American and one Italian held hostage by al Qaeda in the border region of Pakistan and Afghanistan were killed in a US counter-terrorism operatio(...)

  Turkish president Recep Tayyip Erdogan: “We will continue to be on Yemen’s side, whether in humanitarian or in other ways.” Photograph: EPA/Turkish Presidental Press Office

Pakistani prime minister Nawaz Sharif and army chief Raheel Sharif are due in Riyadh on Thursday to mend fences with Saudi Arabia. The kingdom, under(...)

In 2008, Hillary Clinton took advice from two men – Bill Clinton and Mark Penn – and campaigned like a man. Now she must figure out how to campaign as a woman. Photograph: Brendan McDermid/Reuters

The most famous woman on the planet has a confounding problem. She can’t figure out how to campaign as a woman.In 2008, Hillary Clinton took advice fr(...)

Watchtower: A UN peacekeeper on an observation tower on the Golan Heights. Photograph: Jack Guez/AFP/Getty

Undof is the United Nations Disengagement Observer Force. Since September 2013 Ireland’s Defence Forces have provided Undof with a quick-reaction f(...)

An al Nusra front fighter carries his brigade’s flag in Idlib city, after they took control of the area in March. Photograph: Ammar Abdallah/Reuters

A Columbus, Ohio, man who trained with Islamic militants in Syria has been arrested and charged with supporting terrorism and making false statements.(...)

A perilous escalation

Yemen’s civil war is becoming a humanitarian catastrophe, a playing field for regional rivalries and a spoiler in the geopolitical detente between the(...)

Women carry banners during a protest against Saudi-led air strikes on Yemen, in front of the offices of the United Nations headquarters in Beirut April 9th, 2015. Photograph: Aziz Taher/Reuters

Sunni Saudis and their partners contend the air offensive in Yemen is meant to halt Shia Iran’s drive to expand its regional influence by backing Yem(...)