A Japanese restaurant set to open in San Francisco early this month now has to push back that date after being burglarized by thieves who also hosted a large party inside, a report says. 

The owners of a new Ramen Hiroshi location in the city’s financial district told KTVU they approached the restaurant one weekend only to find its windows covered with paper. Once inside, they discovered garbage bags filled with discarded beer and liquor bottles, a cleaned-out wine storage unit, and a surveillance camera system and tables missing. 

"They had a huge drinking and smoking party and they stole stuff that we needed to open our business," co-owner Daniel Bomya said to KTVU. "We are frustrated. We are angry, but we're more surprisingly disappointed." 

The glass storefront of a Ramen Hiroshi restaurant in San Ramon, Calif. The location set to open in San Francisco reportedly was burglarized over the weekend. 

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Footage captured by the station also showed apparent hand-drawn signs that had been set up inside the restaurant to direct partygoers to its bathrooms. One co-owner also told KTVU that he found vomit inside – and in addition to finding discarded cigarette butts, the place smelled like marijuana. 

The owners have since filed a police report and replaced the camera system, according to KTVU.  

The street where the restaurant is set to open. (Google Maps)

The San Francisco Police Department told Fox News the incident happened between Nov. 11 and 16.

"Officers arrived on scene and met with the victim, business owner, who reported business furniture and equipment were stolen from the business, which was in construction," a police spokesperson said. "There was no evidence of forced entry. The investigation is looking for surveillance video and eyewitnesses."

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"We don't want other business to happen like us. It's already hard enough for us to open a restaurant these days," Bonya told KTVU. 

The station reports that the restaurant was set to open Dec. 10, but will have to push back that date one to two months.