Police are investigating a robbery this morning at the PNC Bank branch on Coventry Lane at around 9:30 this morning. Officers are looking for a white male, about 30-40 years of age who was dressed in all black clothing.  Haverhill Elementary School placed on temporary lockdown while the search is underway.  We’ll continue to follow this story and bring you more information here at WOWO.com and on our Facebook and Twitter pages.