Asia Bibi, a Pakistani Christian woman who spent years on death row after being convicted of blasphemy, has left the country, officials have confirmed.

Her conviction was overturned last year by the Supreme Court.

She was originally convicted in 2010 after being accused of insulting the Prophet Muhammad in a row with her neighbours.

Asia Bibi has always maintained her innocence in a case that has polarised Pakistan.

Pakistani government officials did not reveal her destination, or say when she left.

But her lawyer Saif Ul Malook told CNN she had already arrived in Canada. Some of her family are reported to be in Canada.

Asia Noreen – commonly known as Asia Bibi – was kept at a secret location while arrangements were made for her to leave the country.

The Supreme Court’s quashing of her sentence last October led to violent protests by religious hardliners who support strong blasphemy laws, while more liberal sections of society urged her release.

What was she accused of?

The trial stems from an argument Asia Bibi had with a group of women in June 2009.

They were harvesting fruit when a row broke out about a bucket of water. The women said that because she had used a cup, they could no longer touch it, as her faith had made it unclean.

Prosecutors alleged that in the row which followed, the women said Asia Bibi should convert to Islam and that she made offensive comments about the Prophet Muhammad in response.

She was later beaten up at her home, during which her accusers say she confessed to blasphemy. She was arrested after a police investigation.

Acquitting her, the Supreme Court said that the case was based on unreliable evidence and her confession was delivered in front of a crowd “threatening to kill her”.

Why was her case so divisive?

Islam is Pakistan’s national religion and underpins its legal system. Public support for the strict blasphemy laws is strong.

Hardline politicians have often backed severe punishments, partly as a way of shoring up their support base.

But critics say the laws have often been used to exact revenge after personal disputes, and that convictions are based on thin evidence.

The vast majority of those convicted are Muslims or members of the Ahmadi community who identify themselves as Muslims but are regarded as heretical by orthodox Islam.

Since the 1990s scores of Christians have also been convicted. They make up just 1.6% of the population.

The Christian community has been targeted by numerous attacks in recent years, leaving many feeling vulnerable to a climate of intolerance.

Since 1990, at least 65 people have reportedly been killed in Pakistan over claims of blasphemy.

Asia Bibi, who was born in 1971 and has four children, was the first woman to be sentenced to death under the blasphemy laws.