Motorola Solutions quarterly profit nearly doubles

(Reuters) - Motorola Solutions Inc, a maker walkie-talkies and radio systems, reported a near-doubling in quarterly profit, helped by lower costs and higher sales of its products. Motorola Solutions - unrelated to cellphone and set-top box maker Motorola Mobility, which is owned by China's Lenovo - has been cutting costs aggressively in the face of sluggish sales. Motorola Solutions said earlier this year that private equity firm Silver Lake would invest $1 billion in the company to boost its se