Story highlights An attack has killed more than 30 people in the border city of Suruc

Protesters had gathered in Istanbul to show support for the victims before police moved in

Prime Minister Ahmet Davutoglu suggests ISIS is responsible

Suruc, Turkey (CNN) Turkish police fired tear gas and water cannon to disperse demonstrators gathered in Istanbul late Monday in the wake of one of the deadliest terrorist attacks to rock the country in years.

Several hundred protesters had gathered in Turkey's largest city to show support for at least 31 victims of a blast that ripped through a rally earlier on Monday in the Turkish border town of Suruc.

The Turkish government is calling the explosion a suspected suicide bombing.

At least 100 others were wounded, provincial Governor Izzettin Kucuk told Turkish media.

The explosion occurred at midday at the Amara Cultural Park in Suruc, where a group had gathered calling for more help to rebuild the Syrian Kurdish city of Kobani, CNN Turk reported.

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