Indonesian police stand guard in front of an apartment building after an explosion in Sidoarjo, East Java, Indonesia, on May 13, 2018. Five people were hit after a bomb blast occurred in a unit of flats located near a police station in Sidoarjo on Sunday night, police and an eyewitness said. (Xinhua/Kurniawan)

JAKARTA, May 13 (Xinhua) -- Five people were hit after a bomb blast occurred in a flats located near a police station in Siduarjo of East Java province on Sunday night, police and an eyewitness said.

Two persons have been rushed into a hospital and 3 others with parts of bodies covered in bloods were found lying on floor after a bomb blast in a unit of flats (dormitory) placed by an alleged militant with family members, spokesman of provincial police Senior Commissioner Frans Barung Mangera said.

"Two persons have been rushed into a hospital and 3 others remind lying on the floor," he was quoted by local media as saying.

The flat is located behind Taman police station in Siduarjo, the spokesman noted.

An eye witness said that the three people with parts of their body in bloods.

"I have come to the scene to see what happen. I saw the family members covered in bloods lied on the floor," an eyewitness named only Punguh said, saying that one of are three persons is a child.

The explosion at the 5th floor of Block B of the flats took place at 21:15 p.m. Jakarta time and was classified as low-explosive as it sound was weak, according to him.

"The explosion has just happened at the higher floor, its sound was not strongly heard," he said.

National Police Spokesman Brigadier General Mohammad Iqbal said that the police are seeking to find out whether the bomb was purposely planned to explode or it exploded before being used.

"We are checking whether the bomb exploded incidentally or someone detonated it," he was quoted Kompas media as saying.