A train crash in Spain has killed 69 people, and investigators are examining control-room communications and safety systems.

These are messages or contact between staff in the train control room and others.

A joint Russia-Ukraine operation is delivering aid and evacuating residents from occupied Oleshky during a local ceasefire.

It means moving residents away from a dangerous place to safety.

Students and workers marched across Italy, protesting living costs and wages; students also called for more funding for schools and universities.

These are the usual costs of daily life, such as housing and food.

The preliminary report says a chain of failures, instructions and actions could have led to the crash if necessary safety measures had not been in place; investigators say all possible causes remain open.

This is an early report made before the investigation is complete.

The preliminary report says a chain of failures, instructions and actions could have led to the crash if necessary safety measures had not been in place; investigators say all possible causes remain open.

This means a series of problems, where one failure may lead to another.

The preliminary report says a chain of failures, instructions and actions could have led to the crash if necessary safety measures had not been in place; investigators say all possible causes remain open.

It means investigators have not yet ruled out any possible cause.

Russian and Ukrainian officials say the operation is under way, and groups of residents have begun boarding buses.

The operation has started and is continuing.

Oleshky has suffered extensive damage and flooding.

The city has suffered a large amount of damage.

Russian forces took control of it in the first days of the full-scale invasion in 2022.

This means a large military attack involving many forces, rather than a limited one.

In Italy, tens of thousands of students and workers marched in dozens of cities over the cost of living and public spending.

This means the amount people need to pay for everyday needs.

The USB trade union called a general strike, and truck drivers, taxi drivers and farmers joined the protests.

A general strike is when workers in many different jobs stop working to protest.

There were minor scuffles with police in Turin, but no major clashes had been reported by midday.

These were short, small fights or struggles involving people and police.