The two candidates in Sierra Leone's presidential election have agreed not to use vigilantes and former fighters in the last few days of campaigning.
Opposition leader Ernest Bai Koroma and Vice-President Solomon Berewa renounced violence after talks with outgoing President Ahmad Tejan Kabbah.
Mr Kabbah had threatened to impose a state of emergency before clashes on Saturday when 20 people were hurt.
A communique also urged the police to be more effective and impartial.
Foreign observers, who praised the first round, have appealed for calm before the run-off on Saturday.
Saturday's clashes took place close to the headquarters of the governing Sierra Leone People's Party.
Some of those involved had machetes, clubs and knives.
'Heated talks'
Speaking after what he described as "frank" talks on Sunday, Mr Koroma said he was optimistic the agreement would be respected.
"I urge Sierra Leoneans that elections are not about fighting each other," he said.
Mr Berewa said security and the welfare of people was important.
"Politics should not be a war."
The BBC's Umaru Fofana in Freetown says that after what were believed to be heated talks, a joint peace rally initially due to be held on Monday was put off until Thursday - the last official day of campaigning.
Sierra Leone is still recovering from a nine-year civil war that ended in 2002 and cost the lives of more than 50,000 people.
Over the past week there have been several clashes between supporters of Mr Berewa and Mr Koroma, of the opposition APC Party.
Mr Koroma had to abandon a campaign in the east of the country after one clash.
BBC West Africa correspondent Will Ross says that although most Sierra Leoneans are desperate for peace, the fear is that a cycle of retaliation could see the violence escalate.
In the first round on 11 August, Mr Koroma took 44% of the vote to Mr Berewa's 38%.
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