KIEV, May 2. /TASS/. Three hand grenades have been found by law enforcers near Kulikovo Field in the southern Ukrainian city of Odessa, Ukrainian Interior Ministry spokesman Artem Shevchenko said on Monday.
"Law enforcers found three hand grenades in the Kulikovo Field area in Odessa - one RGD-5 and one F1 grenade," he wrote on Facebook citing Deputy Interior Minister Sergei Yarovoy.
According to him, experts and police investigation team are working at the scene, access to Kulikovo Field is limited.
Earlier on Monday, police received an anonymous call that an explosive device had allegedly been planted on Kulikovo Field and in the Odessa Trade Union House.
According to the regional police, a 20-year-old man was detained on Monday with a device resembling a smoke pellet.
Security measures have been tightened in Odessa to maintain order in the city due the commemorative events due to be held later in the day. Additional units of law enforcers have been brought to the city, some streets and squares have been cordoned off.
The city of Odessa saw riots on May 2, 2014, during which soccer fans from other cities, as well as Right Sector militants and so-called "Maidan self-defense" representatives from Kiev organized a march along city streets.
Clashes with federalization supporters occurred during the march.
Radicals set ablaze the Trade Unions House, where their opponents hid, and a tent camp where activists were collecting signatures for a referendum on Ukraine’s federalization and for the status of a state language for Russian. The attackers did not let anyone leave the burning Trade Unions House building.
At least 48 people died and 247 were injured in the clashes and the fire in the Trade Unions House.