Indonesia's capital, Jakarta, was eerily calm on Thursday morning after two nights of deadly clashes between protesters and police that left seven dead and hundreds injured.

The unusually subdued mood in what is normally a frenetic and noisy urban sprawl of more than 30 million people belies a polarization in the country that has been building steam for years. The pressure boiled over on Tuesday night in a wave of political violence that hasn't been seen in the city in decades.

The trigger was the re-election of President Joko "Jokowi" Widodo, who defeated his arch-rival Prabowo Subianto for a second time. Underlying the faceoff between the two are tensions over religion, the military and the distribution of money and power that have racked Indonesian politics for decades.