A roving UHub photographer spotted this seemingly bizarre scene this morning at the old granite shop at Warren and Clifford streets in Roxbury, where Cruz Development Corp. is putting up a two-building complex with 95 housing units, 102 parking spaces and more than 11,000 square feet of commercial space - some of which it will use for its new headquarters. The photographer didn't spot any police officers or firefighters, so we're going to assume the object was perfectly inert.