Anna received a phone call from a friend who runs a nearby bar, telling her his bar had been attacked and five customers sitting on the terrace had been killed.
"Then I got a text from the local police telling me to close the bar and put down the shutters but to keep the patrons inside.
"The fear was that there would be more attacks going on outside," she told RTE Radio One's Liveline today.
Anna moved quickly, pulling down the grills and doing her best to calm the people who were taking refuge in her premises.
"People were just staring at each other. Then after about an hour we went into the bar and turned on the TV. People watched what was going on and commented on it; some were hysterical.
"Total strangers were hugging each other just because it felt right.
"People started running up the streets, we could hear them, but we weren't allowed to do anything about it because we had been asked to keep our doors closed.
"If someone had banged on the door I would have let them in for sure.
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The Bataclan is located only a few hundred metres from Anna's bar, while the other restaurants and bars that were attacked are a mere 5 minute walk in the opposite direction.
She said that although she didn't know any of the people that were assembled in her bar she didn't hesitate in welcoming them.
"You don't think, you see faces and they were really scared, there was a lot of panic," she said.
Anna explained that although Paris is a huge city it is divided up into districts and each area has "its own little neighbourhood".
Around midnight Anna received another text from police saying that she could allow people to leave her premises.
"Some people were desperate to get out, and others who lived close by brought fellow customers to their home as guests for the night.
"Despite something horrific happening there was a great sense of community spirit," she said.
Anna said that she had many friends who lived in a Muslim neighbourhood located nearby.
"I've never considered that as an issue.
"We know the difference between crazy radical lunatics and an ethnic community.
"Most Muslims are very happy to live in Paris and are proud to call themselves French," she said.
"There's a sense of hope here today. We are not going to allow it change our lives, we won't be overcome by hatred."