How the blaze took hold with such ferocity, killing at least 40 people and leaving many more critically injured, is now a key focus for officials.

The 6.5 magnitude trembler shook buildings and set off the country's earthquake alert system.

The US president says "we will come to their rescue" after days of demonstrations and clashes.

Colorado officials said that it would be the first time in more than 25 years that a mountain lion killed a person in the state, if confirmed.

The investigation into the fire that killed 40 people will consider whether criminal prosecutions are necessary, officials said.

The former heavyweight champion was a passenger in the crash, which killed two of his team members on Monday.

The former heavyweight champion was a passenger in the crash, which killed two of his team members on Monday.