article: But the inquiry into the attack on the Pulse gay night club, in which 49 people were killed, is being treated as a terrorist investigation, he added. The FBI's director said the gunman was radicalised through the internet. Meanwhile Donald Trump said he would suspend immigration from certain areas of the world to the US. The presumptive Republican presidential candidate also renewed his call for a temporary ban on Muslims entering the country. The US authorities say gunman Omar Mateen pledged allegiance to IS shortly before the attack in Florida. However, the extent of any links to IS remains unclear. Speaking in Washington, Mr Obama said: "It does appear that at the last minute he [gunman Omar Mateen] announced allegiance to Isil [IS]. "But there is no evidence so far that he was in fact directed. "This is certainly an example of the kind of home-grown extremism that all of us have been concerned about for a very long time." How attacks unfolded Who was Omar Mateen? Police deny false claims of 'multiple gunmen' Orlando shooting: Special report The deadliest mass shooting in recent US history ended when police shot Mateen dead. The attack also left 53 people injured. Orlando Regional Medical Centre said on Monday that a number of the victims being treated there remained critically ill, and five patients were in a grave condition. Responding to the Orlando shootings, Mr Trump reiterated his proposal to ban foreign Muslims from entering the US. "We cannot continue to allow thousands upon thousands of people to pour into our country, many of whom have the same thought process as this savage killer." Mr Trump said: "When I'm elected I will suspend immigration from areas of the world where there is a proven history of terrorism against the United States, Europe or our allies." He also spoke out against any move to increase gun controls, saying he would be "always defending" the Second Amendment which protects "the right of the people to keep and bear arms". 3.3 million AR-15s in the US in 2012 (estimated) 45 rounds per minute 26 people killed by AR-15 in Sandy Hook in 2012 0 days' wait needed to obtain one in Florida Meanwhile presumptive Democratic candidate Hillary Clinton promised to make stopping "lone wolf" attacks a top priority. Mrs Clinton called for action to stop militants getting hold of assault rifles, saying weapons of war had no place on America's streets. FBI Director James Comey told reporters in Washington that there were "strong indications of radicalisation and of potential inspiration by foreign terrorist organisations". "We're highly confident this killer was radicalised at least in some part through the internet," he said. In phone calls to the authorities from the nightclub, Mateen said he was carrying out the attack for IS but he also pledged allegiance to a suicide bomber for the al-Nusra Front group in Syria, and to the perpetrators of the Boston Marathon bombing, none of whom is linked to IS. "We see no indication that this was a plot directed from outside the United States, and
summary: There is no clear evidence that the Orlando gunman was directed by the so-called Islamic State group (IS), US President Barack Obama has said.