Condoling with Pakistani nation and government in case of recent terror attacks against Shia there, Iranian President Mahmoud Ahmadinejad warned against enemy's divisive plots targeting Muslim Ummah, IRNA reported.
The message, which was released on Sunday, stressed that Muslims should be united against their joint enemies.
"International communities and in particular the Pakistan government should prevent repetition of such crimes against innocent civilians."
On Saturday, Iranian clerics and seminary students strongly condemned the fact that the international community has been mostly silent over the massacres of Shia Muslims in terrorist attacks in Pakistan.
In protest over the killings of Pakistani Shias by foreign-backed terrorists, all seminaries in the cities of Tehran and Qom were closed, with teachers and students taking to the streets to censure international organizations for failing to take up the issue.
They also chanted slogans in support of the innocent Pakistani Shias and accused the United States and Israel of being behind the anti-Shia terrorist attacks in Pakistan.
Militants have been waging a violent campaign against Shia Muslims in Pakistan for several years.
Shias living in the Kurram Tribal Agency, which is located in the Federally Administered Tribal Areas, have been facing a humanitarian crisis since November 2007, when extremist groups cut off the area from the rest of the country.
Local sources say hundreds of Shiite Muslims have been killed in Kurram since the start of the campaign.
Shiite religious gatherings have also been targeted in various areas of Pakistan over the past few months.