FILE PHOTO: The logo of United Parcel Service is seen at the new package sorting and delivery UPS hub in Corbeil-Essonnes and Evry, southern Paris, France, June 26, 2018. REUTERS/Charles Platiau

LOS ANGELES (Reuters) - United Parcel Service Inc UPS.N on Tuesday said it is testing "smart lock" technology that allows its delivery drivers to open doors and drop multiple packages at secure locations inside apartment buildings around New York City.The test includes "hundreds of non-doorman" multi-family buildings in Manhattan and Brooklyn that have installed Latch's "smart access system." The project comes as UPS is working to make "last-mile" e-commerce deliveries to households more convenient and cost effective by reducing package theft and the need for drivers to make repeated delivery attempts.

“It’s difficult to securely deliver packages in high-density, multi-family urban residences, especially when people are not at home,” said Jerome Roberts, vice president of global product innovation at UPS.

The partnership with Latch - a New York City-based startup that has raised $26 million in private funding - enables UPS drivers to open entry doors with a handheld device that has a different access credential for each building on a route. Every time a driver enters a building, Latch creates a traceable record.

Derek Banta, UPS’s director of global product innovation concepts, said the parcel delivery company will assess the potential cost savings from “completing more deliveries on the first attempt.”

UPS, the world's largest package delivery company, and rival FedEx Corp FDX.N have invested billions of dollars to upgrade their networks to handle surging demand for e-commerce deliveries. Residential deliveries typically cost more than business deliveries because drivers usually drop more packages per stop at offices than at homes.

FedEx told Reuters it began testing smart lock technology in select markets before the winter holiday shipping season last year. FedEx declined to identify the test markets or its smart access technology partner.

Latch a year ago teamed up with Walmart Inc's WMT.N Jet.com e-commerce site to test its technology at 1,000 residential buildings in Manhattan and Brooklyn. Walmart also made waves in September when it started dropping packages inside homes - or groceries inside refrigerators - as part of a test with August Home smart lock customers in Silicon Valley.

Amazon.com AMZN.O late last year announced a secure-lock service called Amazon Key that enables Amazon Logistics delivery workers to briefly unlock a customer's door to drop a package inside.