Question

Each of the suspected men......... arrested (supply a verb in agreement with its subject) ​

Answer 1

Answer:

Each of the suspected men was arrested.

Explanation:

Each is a determiner and pronoun. In formal English, with the pronouns another, each, either, neither and one always singular verbs, singular personal and possessive pronouns are used.  

e.g. Each of the children wants to take part in the function.

Each of the children performed excellently in his examination.

Answer 2

Answer:-

Each of the suspected men was arrested.