A bartender says the Florida nightclub shooter stalked her nearly a decade ago, sending her so many uncomfortable messages on Facebook that she blocked him on the social network.

Families of some of the 49 people killed in a massacre at an Orlando gay nightclub will mourn and bury their dead today, a day after President Barack Obama meets survivors and says the United States must act to control gun violence.

G4S shares fell 4.9% on Monday after it emerged the company had employed Orlando gunman Omar Mateen, who killed 50 people in a Florida nightclub.