On Twitter, Rodriguez availed himself to extend his heartfelt condolences to families and relatives of the victims and wished a speedy recovery to injured ones.

At least nine people were killed, including students and a security guard, and seven were injured on Wednesday at the Vladislav Ribnikar elementary school as a teenager opened fire.

According to local authorities, the 14-year-old suspect has already been arrested.

The Serbian government announced a three-day mourning from coming Friday in honor of the victims.

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