The mother of the mass murderer who slaughtered 38 innocent holidaymakers in Tunisia has said her son is a 'victim' who must have been 'brainwashed'.

Radhia Manai, 49, claims her son Seifeddine Rezgui 'couldn't kill a mouse' in an interview following the massacre.

On June 26, Rezgui opened fire on a beach in Sousse and chased people into the Imperial Marhaba Hotel where he sprayed them with bullets and lobbed homemade explosives at them.

Scroll down for video

Terror: Seifeddine Rezgui wielding an AK-47 on the beach at the beach resort of Sousse in Tunisia on June 26

Radhia Manai said her son Seifeddine Rezgui 'couldn't kill a mouse' despite the fact he killed 38 holidaymakers

Speaking to The Sunday Times from her home in Gaafour, Tunisia, she said: 'I couldn't believe it, I can't believe it.

'Once there was a mouse in the house and I asked Seifeddine to kill it and he refused saying, "I can't kill anything". My son is a victim like all the others.'

Radhia believes someone was pressurising her son and perhaps threatening to kill him if he didn't carry out mass-murder.

'They must have given him drugs and brainwashed him,' she added.

Radhia said she feels sorry for the victims and their families and hopes the people behind the plot are found.

On Friday, the families of the 30 Britons who were killed were joined by the entire country in a minute's silence to remember those who died on June 26.

Predator: Assault rifle in hand, Regzui was pictured stalking the streets of the popular holiday resort town

The body of 23-year-old Seifeddine Rezgui pictured after he killed 38 innocent holidaymakers in Tunisia

Eyewitnesses described how the ISIS fanatic arrived on the beach on a jet-ski with a parasol which concealed the assault rifle he would soon use to gun down dozens of innocent people.

He then chased people into the Imperial Marhaba Hotel where he shot at them and threw bombs.

Hotel workers tried to stop the killer - a maid threw a chair from a balcony, others threw ashtrays and at one point hotel staff formed a human barrier around the holidaymakers.