"Police recovered cell phones from two under trials, one of whom is facing a murder charge," Faridkot SSP Gurpreet Singh Toor said.
"20 syringes were recovered from the bathroom, besides knives and small iron rods," he said.
Superintendent of Jail J P Singh said if jail employees were found to be helping inmates, they will not be spared and strict action will be taken against them.
Meanwhile, Sub-Divisional Magistrate Darshan Singh Grewal visited the jail yesterday as Punjab Chief Minister Parkash Singh Badal had ordered a magisterial inquiry into the April 22 incident.
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Three undertrials lodged in the jail here have died due to various reasons during the last few days.
Thirteen jail inmates have been booked in connection with the violence.
During the search of inmates' barracks on Wednesday, police had recovered drugs and needles.