File photo. Photograph:( Reuters )
No information on the number of casualties was available
According to Syrian media, government's military provinces of Hama and Aleppo were targetted by enemy missiles, the attackers have not been identified.
The attack was confirmed by the Syrian Observatory of Human Rights monitor which also informed about the presence of "Iranian elements" at two of the targeted bases.
"Syria is being exposed to a new aggression with some military bases in rural Hama and Aleppo hit with enemy rockets," an army source was quoted as saying without elaborating.
Earlier, state television said successive blasts were heard in rural Hama province and that authorities were investigating the cause.
An opposition source said one of the locations hit was an army base known as Brigade 47 near Hama city, widely known as a recruitment centre for Iranian-backed Shi`ite militias who fight alongside President Bashar al-Assad`s forces.
No information on the number of casualties was available.
Meanwhile, Syria and its ally Iran recently accused Israel of conducting deadly strikes against a military base in the heart of the country.
The United States and its allies France and UK carried out strikes targetting several Syrian regime's military positions on April 14.
The US-led attack came in response to a suspected chemical attack by the Syrian regime on rebel-held Douma.
(With inputs from agencies)