Dozens are feared dead after the school in Bilohorivka in the Luhansk region of eastern Ukraine was bombed and caught fire on Saturday.
The Foreign Secretary said she was "horrified" and added Vladimir Putin's regime in Moscow would be held to account.
Around 90 people were thought to have been sheltering at the school but just 30 have been rescued.
Ms Truss tweeted: "Horrified by Russia's latest attack on a school in Luhansk, resulting in the deaths of innocent people sheltering from Russian bombardment."
She said the deliberate targeting of civilians and infrastructure "amounts to war crimes” and “we will ensure Putin's regime is held accountable".
Her comments came as G7 leaders, including Boris Johnson and Joe Biden, prepared for talks with Ukraine's president Volodymyr Zelensky.
هذه القصة مأخوذة من طبعة May 09, 2022 من The Herald.
ابدأ النسخة التجريبية المجانية من Magzter GOLD لمدة 7 أيام للوصول إلى آلاف القصص المتميزة المنسقة وأكثر من 9,000 مجلة وصحيفة.
بالفعل مشترك ? تسجيل الدخول
هذه القصة مأخوذة من طبعة May 09, 2022 من The Herald.
ابدأ النسخة التجريبية المجانية من Magzter GOLD لمدة 7 أيام للوصول إلى آلاف القصص المتميزة المنسقة وأكثر من 9,000 مجلة وصحيفة.
بالفعل مشترك? تسجيل الدخول
SZUCS PRAISED
THE HUNGARIAN HAS BECOME A FIRST TEAM REGULAR
Albion aim to recover from loss at Rotherham
PLYMOUTH Albion are aiming to recover from a gut-wrenching defeat to Rotherham, where they were narrowly beaten in the final moments of the game.
Argyle linked with move for Swedish midfielder
PLYMOUTH Argyle are considering making a bid for 23-year-old Swedish midfielder Fredrik Hammar in the January transfer window, according to a report in the Scandinavian media.
£15m 'wasted' on migrant camp site
THE Home Office spent £15m buying a derelict prison contaminated with asbestos amid political pressure to stop housing migrants in hotels, according to Whitehall's spending watchdog.
Safety pledge for Brits going overseas for ops
THE Health Secretary has said he will work to improve safety for Britons travelling abroad for cosmetic procedures in the wake of several deaths.
McCall reveals tumour diagnosis
CELEBRITIES have flocked to wish Davina McCall well after she revealed she has been diagnosed with a brain tumour, with fellow TV presenter Amanda Holden sending \"so much love\".
Experts: Climate talks 'no longer fit for purpose'
THE process of UN climate negotiations is no longer fit for purpose and requires a comprehensive overhaul, leading experts have warned.
Uber and rival bid to run in city
LICENSING COMMITTEE WILL DECIDE WHETHER TO ALLOW
24-hour gym to open at Barcode?
PLANNING PERMISSION HAS BEEN SOUGHT
Barbican eatery best in the South West at awards
A PLYMOUTH restaurant has been selected as the 'Best South West Restaurant' at the Taste of the West awards. Owners of 'The Fig Tree @ 36' are over the moon to have scooped the prestigious award.
