Families of some of the 49 people killed in a massacre at an Orlando gay nightclub mourned and buried their dead, a day after US president Barack Obama met survivors and said the United States must act to control gun violence.

Police arrested dozens of activists in China as President Barack Obama arrived on his first state visit to the country today.

Individual expression is not an American ideal but a universal right that should be available to all, US president Barack Obama said today as he began a visit to China.