Ellen Sirleaf Johnson prepares for inauguration of second term while Winston Tubman is chased out of party headquarters

There are no prizes for coming second in Liberia. While Ellen Johnson-Sirleaf, Africa's first and only female president, was preparing to enjoy her second term inauguration, her defeated opponent was fleeing an angry mob. Winston Tubman, who boycotted last November's disputed election, was chased out of his party headquarters on Sunday by supporters protesting at his decision to recognise Johnson-Sirleaf's government. "The youths stormed the party's headquarters," Acarous Gray, secretary-general of Tubman's Congress for Democratic Change (CDC) party, told Reuters. "We had to get him out of the compound."

An aide for Tubman's Congress for Democratic Change party, which alleged vote-rigging, said he was not injured but had relocated to Monrovia, and would return when the situation cooled.

Tubman and his running mate, former international footballer George Weah, refused to contest the runoff election, allowing Johnson-Sirleaf to secure a landslide of 90.8%. Turnout was 38%.

Tubman and Weah met Johnson-Sirleaf at the weekend and agreed to call off ademonstration planned for January 16 and recognise her government.

Tubman said the CDC party still did not think the president had won the election fairly, even though she had the backing of the international community. "We realised that we couldn't fight all of that, so we thought the best thing would be for us to negotiate our involvement in a government of inclusion," he said.

The move was viewed by some CDC supporters as a betrayal. They included Sylvester Perry, who told Reuters: "This lady is not good … [Tubman's] action has shown to us that he sold the party to president Johnson-Sirleaf."

Johnson-Sirleaf, aged 73, who was jointly awarded a Nobel Peace prize shortly before last year's election, first came to power in the country's 2005 elections and promised to serve for a single term. She went back on her word, saying the constitution gave her the right to run again and that six years was insufficient to tackle Liberia's challenges after 14 years of civil war.

Hillary Clinton, the US secretary of state, joined African leaders and dignitaries at the swearing-in of the Harvard-educated Johnson-Sirleaf on Monday. The inauguration ceremony, including a huge parade in the capital and several inaugural balls and receptions, was estimated to cost $1.2m (£783,211).

Chief Justice Johnny Lewis administered the oath of office toJohnson-Sirleaf and vice-resident Joseph Boakai at noon, sending the crowd into a frenzy.