The night before another wave of anti-regime protests, 1,200 Iranian university students were stricken with “vomiting, severe body aches, and hallucinations” because of food poisoning, the Telegraph reported Tuesday.

Students at Kharazmi University and Arak University experienced the symptoms last week, according to Iran’s national student union. At least four other universities are also reporting mass food poisoning, the Telegraph reported.

“The severity of the students’ condition has sent them to the hospital,” the student union wrote on the instant messaging site Telegram.

Students had planned the protests in honor of Iran’s Student Day.