Friends and family are increasingly concerned about the disappearance of Michelle Yu, a Toronto high school student who has not been seen in two days.

Yu was last seen at a TD Bank in downtown Toronto, which her family says is not the branch she typically uses. She appeared to be alone.

Police say they have no further information on her whereabouts.

The 18-year-old is only weeks away from finishing high school and has been accepted to a half-dozen universities.

Her friends and family say it is out of character for her to go missing. All they want is for her to be found safe and sound.

"Everyone at her school loves her, everyone at her Girl Guides, everywhere she goes, everyone loves her," her friend Vanessa Laxton told CBC News.

"So, we just really want her to come back."

There is also concern about her health: Yu has a heart condition and has been without her medication for two days.

Friends turn to social media

Friends and family have been sending out the message on Facebook and Twitter that Yu is missing.

Scores of Yu's friends were also handing out posters with information about her disppearance at Thursday night's Blue Jays game.

Pelin Tan is one of many friends of Michelle Yu who handed out posters about the missing 18-year-old at Thursday night's Blue Jays game. (Patrick Morrell/CBC)

They have also been putting up posters in Toronto with her face on them.

"Toronto’s a big city, so, if people are passing through here and they see her face, maybe they could have spotted her, even somewhere else," Laxton said.

Yu is of Asian descent, is five feet seven inches tall and weighs about 125 pounds.

She was wearing a grey American Apparel hooded sweatshirt, brown moccasins and may be wearing glasses.

Anyone with information is asked to contact police at 416-808-3300. An anonymous tip can also be left on the Toronto Police's Facebook page.