The Houston schools superintendent says there is a problem with some employees after a recent string of drug-related arrests netted nine district employees.
Most of the arrests have involved marijuana police said they found in employees' cars at school.
Phone tips to Houston school district police prompted the searches.
Superintendent Abelardo Saavedra told the Houston Chronicle he was troubled by the arrests.
Saavedra said the school district has a plan to deal with the issue.
He did not reveal details of it, only saying he anticipated officials doing more searches.
Nine HISD employees - eight teachers and one custodian - have been arrested on drug charges this school year.
In at least one case, prosecutors did not bring charges.
Conducting random drug tests of teachers has been brought up in
the wake of the arrests.
Saavedra said he was not sure whether the district could legally
conduct random tests of teachers, and he was not sure it was
HISD's current policy only calls for random drug testing of bus
drivers, police officers and other security personnel.