HELSINKI (AP) - Nokia Corp. said yesterday it will lay off 1,700 people worldwide to cut costs, as the global economic downturn strikes deeper into the mobile phone sector.

The world's top mobile phone maker said the job cuts will affect several sectors, including its devices and markets units, the corporate development office and global support functions.

"The number of employees we have to reduce is 1,700," Nokia spokeswoman Arja Suominen said, adding that details would be announced after the company begins negotiations with employees.

Nokia shares fell two percent in Helsinki to close at 8.65 euros ($11.25) after the announcement, which came as the industry bellwether continues to struggle with falling demand and handset prices.

In January, Nokia warned of major cost-cutting measures after its fourth-quarter net profit crashed 70 percent to 576 million euros ($744 million). It also lost market share, which fell to 37 percent from 38 percent in the previous quarter and 40 percent in the fourth quarter of 2007.

Nokia said it would aim for annual savings of 700 million euros at its handset unit, but gave no details at the time.

Last month, Nokia said it will close a research centre, ax up to 320 jobs and temporarily lay-off 2,500 workers in Finland. It also announced a global voluntary resignation programme, open to employees until May 31, in a move aimed at cutting personnel by 1,000.

It has also said it plans to increase short-term unpaid leaves and sabbaticals, and has appealed to employees to accept holiday time as payments, instead of cash, for overtime work in 2009.

Based in Espoo near Helsinki, Nokia last year remained the No.1 cell phone maker selling 468 million handsets, up seven percent on 2008. It employs 128,400 people worldwide.