The intelligence chief of Egypt's deposed leader Hosni Mubarak formally joined the race for the presidency on Sunday, a last-minute entrance that raises the heat in a contest pitting former regime figures against newly-assertive Islamists.
Omar Suleiman announced he planned to run on Friday, saying overwhelming public pressure had stirred his sense of soldierly duty. He had needed to collect the signatures of 30,000 eligible voters by Sunday's deadline in order to take part.
Ecstatic supporters cheered behind lines of military police as Suleiman arrived at the office of the state election committee in Cairo. He then handed in his candidacy documents, state news agency MENA reported, citing a committee official.
Committee General Secretary Hatem Bagato "acknowledged that the papers included certified backing from citizens above the minimum required, which is at least 30,000," the agency said.
Suleiman, who Mubarak made vice president in the dying days of his three-decade rule, symbolises that era's tough security regime, making him a figure of hate to the young liberals who spearheaded Mubarak's overthrow last year but a possible draw for some Egyptians hoping for an end to political instability.
Supporters of the urbane, secretive 74-year-old jostled with the security forces protecting the building, causing some injuries and the main entrance was briefly closed.
Late additions to the candidate line-up and efforts to exclude some frontrunners from the job have shaken up Egypt's first free presidential vote due to be held in May and June.
Suleiman's arrival on the scene comes shortly after the Muslim Brotherhood, the Islamist movement long suppressed by his former boss, scrapped a pledge not to field a candidate and nominated its deputy leader Khairat al-Shater for head of state.