Uhuru Kenyatta on Tuesday was sworn in for a second term as president of Kenya, after a month long election controversy that has left the nation deeply divided.

The ceremony began amid heavy security in parts of the capital, Nairobi, following a call by the opposition for peaceful demonstrations in memory of dozens killed by police and militia while protesting Kenyatta’s re-election.

Kenyatta, 56, took two oaths of office as his second five-year term was sealed by the signature of Chief Justice David Maraga. An election victory in August was overturned by the Supreme Court, forcing him to face a re-run that was boycotted by the opposition.