A third person was confirmed dead on Wednesday in devastating bushfires that engulfed Australia's southeast coast this week and a fourth was missing and feared dead, as navy ships rushed to provide supplies and assist with evacuations.

gunman has opened fire in a church in Texas, fatally shooting two people before being killed by an armed member of the congregation.

The gunman stood up from a pew at West Freeway Church of Christ in White Settlement, a suburb of Fort Worth, pulled out a shotgun and began firing.

An enormous car bomb blast left at least 30 people dead and many others wounded in the Somali capital Mogadishu on Saturday, police and witnesses said.

heatwave forecast to sweep across Australia in coming days could escalate conditions for the nation's bushfires, authorities fear.