For the second time recently, Buffalo police and Canisius College public security officers issued warnings Wednesday about dangerous water bottle bombs left on city streets near the college’s Main Street campus.

Two such explosive devices were found in the 100 block of Hughes Avenue on April 14 and reportedly caused property damage to a house.

On Monday, a similar device was found on Meech Street, just around the corner from Hughes.

Police reported the Meech Street device exploded but no injuries or property damage resulted. Both incidents remain under investigation by Buffalo police.

Canisius College security and Buffalo police again alerted students and residents on Wednesday in the area of the danger. If further such devices or other suspicious objects are found, officials want everyone to stay clear of the devices and to call authorities immediately.