Suspension without any warning or show cause

yes         

if it is so, can suspension be challenged.....................................................?

Yes                

As per service laws suspension is not punishment. It is a method of keeping the employee about to be charged from tampering with evidence . No notice is necessary since substistence alloowance is paid duringsuspension and the employee afterv stipulated time gets upto 75% of his pay and DA. the suspension period is to facilitate gather of information without the employee is being aware what the charge is to be and to avoid unwarranted intervention.

However in abnormal period of suspension you can approach the court for revokal after making a representing the same to your eemployer first.

Howver the courts do not usually interfere with administrative procedure unless there is a glaring defect in the process.

Avrao