Somalia has fallen into a new political crisis after President Hassan Sheikh Mohamud announced that his term, due to expire on May 15, had been extended for a year.

For the first time in years, Somalis endured a night of gunfire in the capital, Mogadishu, as political factions clashed over an extension of the president's term.

International observers have expressed concern, with the US embassy in Mogadishu calling the violence "reckless" and urging dialogue.

Here is what we know:

President Hassan Sheikh Mohamud's supporters changed the constitution in March laying out the framework for Somalia's first direct elections, moving away from the clan-based system in which elders pick their representatives.