Police in Vaughan are warning residents to be vigilant, in the wake of a rash of break-ins in one area.
York Regional Police say 9 homes have been broken into since June in an area near Clark Avenue West and New Westminster Drive.
Constable Laura Nicolle says they believe 20 other break-ins dating back to October of 2013, are also linked.
But she's warning residents to not post anything on social media, advertising the fact that you'll be leaving for an extended period of time.
It's not uncommon to see 'I'll have my feet in the sand in exactly 6 hours!' or 'So long suckers! Gone for a week!', posted on facebook or twitter.
But Nicolle says in these cases, the criminals have been doing their homework.
She says they have 'cased' the area, and know when people are home, know their routines, and know when the home is empty.
Most of the break-ins have happened in daylight.
Jewelry, small electronics and cash are usually the targets and it's a quick in and out grab for the thieves.
But Nicolle says you should try and make you home look lived in when you go, possibly enlisting the help of a friend or neighbour.
"Have a neighbour come by and mow the lawn, or pick up the newspapers, that kind of stuff" recommends Nicolle.
When it comes to this rash of break-ins, police have yet to make an arrest.