KIDAPAWAN CITY -- A Grade 1 teacher from the elementary department of Central Mindanao Colleges in Kidapawan City, Cotabato allegedly tied up her students to control their behavior.

According to the grandmother of one of the students, their helper took a picture of her grandchild and three other students with their feet tied up.

The picture was taken Tuesday afternoon.

"Lola Helen" then went to the school's principal to complain about what happened.

The teacher allegedly said she lost her patience, prompting her to tie up her students' feet.

According to a statement from Central Mindanao Colleges, the teacher has been placed under preventive suspension while investigation on the incident is ongoing.

The school administration also assured the students' families that they will not allow a similar incident to happen in the future. -- report from Lore Mae Andong, ABS-CBN News Central Mindanao