The new technique could help tackle hard-to-reach tumours

Injecting cancerous tumours with a chemical then zapping them with a flash of light can cause them to commit "cell suicide", scientists have found.

A new technique can kill the cells in under two hours, and clinical trials with laboratory mice have a 95% success rate.

The technique is called "photodynamic therapy" and has been shown to cause cancer cells to effectively self-destruct in fewer than 120 minutes.

The "cell suicide" happens because they became too acidic to survive after being injected with chemical compound nitrobenzaldehyde.

The flash of light kick-starts the chemical reaction.

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