64 people were detained in Istanbul on Sunday on charges of trying to prevent people from casting vote.
Separately, 523 people wanted by the police were detained in Istanbul while they were casting their votes.
15,000 police were assigned to ensure the security of the referendum in Istanbul.
In a separate incident, one soldier was slightly injured when unidentified assailants opened gunfire on a military vehicle ensuring security of another vehicle carrying ballot boxes near Agacdibi village in southeastern province of Hakkari.
From the ballot boxes counted: 15,318 (10.08 percent of total) over the government-backed package of constitutional reforms showed that 67.1 percent of the voters approved the amendments while 32.9 percent voted against.
The citizens voted in 32 provinces in east of Turkey between 07.00 a.m -4.00 p.m. and in 49 provinces in west of Turkey in 08.00 a.m. - 5.00 p.m.
President Abdullah Gul casted his vote in Ankara, Prime Minister Recep Tayyip Erdogan in Istanbul, Kemal Kilicdaroglu, the chairman of the main opposition Republican People's Party (CHP), could not cast his vote because of a problem in voter list. Devlet Bahceli, Chairman of the Nationalist Movement Party (MHP) casted his vote in Ankara.
Five referenda have so far been held in Turkey regarding constitutional amendments.
The first referendum took place for 1961 Constitution which was prepared after military intervention on May 27, 1960. The constitution was adopted with 61.7 percent affirmative votes in the referendum, held on July 9, 1961.
Under the constitution submitted to referendum, Cemal Gursel was elected as the fourth president of Turkey.
After 21 years, Turkish voters went to polls for the second time to vote on 1982 Constitution which was prepared after military intervention September 12, 1980.
The second referendum took place on November 7, 1982. A total of 18,885,488 electors joined the referendum. 17.5 million of the electors (91.37 percent) voted in favor of the Constitution, whereas 8.3 percent gave "no" votes.
1982 Constitution took effect on November 9, 1982 and Kenan Evren became the president. Evren's term in office expired on November 9, 1989.
Third referendum took place on September 6, 1987 to decide whether the banned leaders should be allowed to return to politics or not.
According to results announced by Higher Electoral Board on September 12, 1987, 50.3 percent of the electors voted "yes" and 49.8 percent voted "no" out of the 24,436,821 electors. The political bans were thus cancelled.
AALast Mod: 12 Eylül 2010, 21:13