08 August, 2008 - Published 13:59 GMT
The Government Agent (GA) in the Mulativu is among the injured after a shell attack allegedly launched by the military, officials said.
Additional Government Agent in Mulativu, S Partheeban, told BBC Sandeshaya that GA Emilda Sukumar and wife of the District Medical Officer (DMO) were among the injured.
A small child was killed and at least 18 others have sustained injuries in the incident.
Mr. Partheeban added that Mulativu hospital buildings were also dmaged as some shells were dropped at the hospital premises.
Military denies involvement
Four people with serious injuries were admitted to Vavuniya hospital.
One of them told BBC Sandeshaya that shell attack launched from Weli-Oya dropped to their village at about 01am (SLT).
She said some houses were also damaged in the attack carried out by Sri Lanka military.
However military spokesman, Brigadier Udaya Nanayakkara, denied any military involvement.
He told BBC Sandeshaya that the attack might have been carried out by the Tamil Tigers.
Mulativu is a LTTE stronghold where government offices and hospitals are also operating.