A tablet given to the kids after the vaccination may have caused complications. (Representational)

A toddler died and 26 other children were hospitalised in Hyderabad on Thursday after they developed complications a day after being administered vaccine at an urban primary health centre, officials said.

The baby boy was brought dead, while two of the 26 children admitted to the Niloufer Hospital so far are in critical condition. Several children who were vaccinated at the public health centre in Nampalli were brought to the hospital with complaints of fever, an official release said but did not give details of the vaccine or the age group of the children.

The families of the other children, who received the vaccination were also asked to bring their children for medical examination.

Officials said so far 26 children had been admitted to the Niloufer Hospital for tests.

A senior medical official said that the tablet given after administering vaccines could have caused complications. Tough action would be taken against those responsible for the incident after a thorough inquiry, officials said.

A family member of a child, who developed complications, claimed that the baby fell unconscious after the tablet was given.