On Saturday, five Iranian border guards were martyred in Saravan region in Sistan and Baluchestan province in an overnight clash with gunmen trying to sneak into the country through Southeastern border. The terror attack was carried out by several militants which intended to infiltrate the country’s border but fled to the other side of the border after the fierce confrontation.

The Iranian Foreign Ministry criticized the silence of the self-proclaimed advocates of human rights and European ambassadors on the terrorist attack.

"Why is there no sign of the self-proclaimed advocates of human rights and [those who claim to be] fighting against terrorism," Spokesman Nasser Kana'ani said in a post on his Twitter account on Monday.

The senior diplomat also slammed European ambassadors in Tehran for refraining from sending a "united message" regarding the martyrdom of the Iranian border guards.

He emphasized that Iran has been fighting terrorism and drug trafficking for years thanks to the sacrifice of its generals and soldiers.

Iran’s Deputy Police Chief Brigadier General Qassem Rezaei has issued a strong warning to terrorists behind the fatal raid, and pledged that harsh punishment is awaiting the militants over the bloodshed.

“Today, police forces are more resolved and you will hear the news of the revenge in the near future,” he stated.

The deputy police chief also emphasized that such incidents will not create divisions between Iran, Pakistan and Afghanistan as the trio enjoy long-standing relations.

Separately, the Iranian border police commander warned neighboring countries to observe the principle of good neighborliness and not allow destabilizing activities on their soil.

“Our patience has limits,” Brigadier General Ahmad Ali Goudarzi stressed.

Iranian security agents have in recent years dismantled several terrorist networks affiliated with the foreign-backed notorious terror group known as Jaish Al-Adl in the Southeastern province of Sistan and Balouchestan.

Sistan and Baluchestan province, which borders Pakistan, has witnessed several terror attacks targeting both civilians and security forces over the past years.

The Pakistan-based Jaish Al-Adl has conducted several bomb attacks and kidnappings in Southeastern Iran in a bid to disrupt the country’s security. The terror group enjoys all-out backing of the United States and some Arab countries in the West Asia region.

Iran has in recent months captured several members of spy networks affiliated to foreign secret services. The militants were involved in making explosives and hand-made bombs and linked to foreigners and planned to carry out counter-security acts and set up operational groups to direct the riots in Iran.