The CRPF men were rushed to nearby hospitals after they complained of stomach pain and vomiting after consuming food.
Hospital authorities suspect that the fish that was cooked for them might be the reason behind the suspected food poisoning.
Some of the personnel were put on IV drips, while others were given tablets based on their condition.
109 jawans are under observation at Trivandrum Medical College Hospital.
State Health Minister KK Shylaja visited the personnel at the hospital to take a stock of the situation.
(With inputs from PTI)