SOURCE: http://now.msn.com/boston-marathon-bombing-aid-tips-from-red-cross

Register with the American Red Cross' Safe and Well website to tell loved ones you are OK. This way family and friends can search the registry for the people they are worried about.

Help the Red Cross assist victims and their families by making donations or donating blood.

Please be aware of FAKE CHARITIES on Twitter or elsewhere asking for retweets, texting or donations to support the victims.

Boston Police Commissioner Davis announced this hotline number for those searching for loved ones: (617) 635-4500. 

If you have information for police, you can call 800-494-TIPS.