Istanbul goes into security lockdown to stop May Day rallies
Istanbul is in a security lockdown as thousands of police manned barricades to stop May Day rallies in Taksim Square, a symbolic point for protests.
Turkish police used water cannon and tear gas on hundreds of stone-throwing protesters after the demonstrators attempted to defy a ban and march on Taksim Square in central Istanbul.
A traditional rallying ground for protests, authorities shut down much of the city's public transport and dispatched riot police to block demonstrators from gathering in the square.
Read More: It is 'discrimination' to call massacres of Armenians 'genocide', Turkey says
Hundreds of flag-waving protesters instead gathered in the nearby Besiktas neighbourhood, where they were held back by lines of police.
Thousands of protesters also gathered to march in the capital Ankara.
Critics say President Tayyip Erdogan and the government have become more authoritarian ahead of June elections.
"This meeting is peaceful and is not armed," opposition politician Mahmut Tanal, holding a pocket-sized book of the Turkish constitution, told Reuters in Istanbul.
"People want to express their problems but the government doesn't want those problems to be heard ahead of elections."
Read More: Turkish President Erdogan fined for calling peace statue a 'monstrosity'
The normally thronged Isitklal shopping avenue leading to Taksim is deserted, with shops shuttered and metal barricades blocking off sidestreets.
A usually bustling square lined with cafes and hotels, Taksim is filled with police buses, ambulances and satellite broadcast trucks.
The government had said Taksim would only be open to those who came peacefully and not for "illegal demonstrations".
"I wish May 1 to be celebrated in a festive mood without provocations," Erdogan said in a statement.
Opposition parties and unions called on the government to lift the ban.
Read More: Turkish President ridicules men who wore skirts to protest domestic violence
Erdogan has previously dismissed protesters as "riff-raff" and terrorists, outraged by the unrest in 2013 that brought unwanted international attention and posed the biggest challenge to his AK Party since it came to power in 2002.
He is aiming for a massive victory for the party in June parliamentary polls, which would allow it to change the constitution and give him broad presidential powers.
The 2013 Taksim protests began as a peaceful demonstration against plans to redevelop Gezi Park, a leafy corner of the square.
After a police crackdown the demonstration spiralled into weeks of nationwide protests against Erdogan's rule.