Jennifer Lopez has returned to Instagram for the first time since news of her split with long-time boyfriend Casper Smart broke earlier this week. The signer and actress posted a cryptic message to the photo-sharing site, which seemed to allude to her recent heartbreak.

A photo posted by Jennifer Lopez (@jlo) on

Taken on the set of her NBC cop drama ‘Shades of Blue’, J.Lo was pictured in a suit, standing above some sidewalk graffiti which read ‘Protect Yo Heart’. Lopez caption the pic ‘@egt239 I think this is what you meant to post,’ a message to the show’s producer Elaine Goldsmith-Thomas, who had also shared the photo but accidentally cropped out the message on the street art.

More: Jennifer Lopez Has Reportedly Split From Casper Smart Again

Earlier this week it was reported that Lopez had split from longtime on again-off again boyfriend Casper Smart. A source told People magazine: "Jennifer and Casper have split They have not been together for a few weeks.

"It wasn't anything dramatic and they were on good terms – it just came to a natural end," the source added. "They will remain friends and they see each other, but they are not together. It was very amiable."

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The couple were first rumoured to be dating in 2011, with Lopez confirming the romance a year later. Speaking about his girlfriend earlier this year to People, 29-year-old Smart had said: “She's sweet, funny, nice, easygoing and gracious. You can't ask for anything more. She's beautiful."