For the first time in the Jessica Ridgeway murder case, investigators released the description of man who used a chemical-soaked rag in an unsuccessful attempt to abduct a 22-year-old woman near Ketner Lake on May 28. 
 
 Police stressed in their announcement on Thursday that they are linking the two cases in "an attempt to uncover any lead" in the Jessica Ridgeway's Oct. 5 abduction and subsequent murder and dismemberment. 
 
 "Police are trying to determine if there is any connection between the two cases," authorities said in a bulletin to media Thursday afternoon. 
 
 Ketner Lake Open Space is only about a half-mile from Jessica's home and immediately south of Witt Elementary School, where she was headed that Friday morning, though she never made it. 
 
 On May 28 the young woman said she was grabbed by a man described as white or light-skinned and between 18 and 30 years old, with brown hair and a medium build. He was about 5 feet, 8 inches tall. 
 
 The woman had initially jogged past the man, police said, then he grabbed her from behind "trying to put a rag over her mouth. She said the rag had a chemical smell on it. She was able to get away and called 911 from her cell phone." 
 
 Law enforcement has no description of a vehicle related to that case, police aid. 
 
 Police have said they had no information connecting Jessica's case to any other previous metro area abduction cases . 
 
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 Westminster police also are looking at other attempted abductions in the Denver metro area to see whether those suspects could have been involved in Jessica's kidnapping on Oct. 5 , followed by the discovery of her body 11 miles away in an Arvada open space on Oct. 9. 
 
 "Several metro area law enforcement jurisdictions are working other cases of attempted abductions and various vehicle or suspect descriptions have been provided," Westminster police stated Thursday. 
 
 Investigators are asking the public to call if they know of someone whose behavior has been unusual, including failing to show up at family activities or abrupt changes in appearances or habits around Memorial Day or Oct. 5. 
 
 Anyone with information can call Westminster police at 303-658-4336 or by sending an e-mail to PDamberalert@cityofwestminster.us 
 
 Joey Bunch: 303-954-1174, jbunch@denverpost.com or twitter.com/joeybunch ||||| Police in suburban Denver say a 17-year-old boy has been arrested in the abduction and killing of a 10-year-old girl and the attempted kidnapping of a runner. 
 
 Westminster police say they arrested Austin Reed Sigg after getting a tip that led them to a home Tuesday night. 
 
 Sigg's Westminster home is about five miles from the home of Jessica Ridgeway, who disappeared Oct. 5. Her body was found five days later in a field at a park. 
 
 The break comes two days after police said Jessica's abduction was linked to the attempted abduction in May of a 22-year-old runner at another park, the Ketner Lake Open Space. Police say their tip led them to a home near that park, which is close to Jessica's school. 
 
 Sigg will be charged in both cases. 
 
 Reached by phone Wednesday, Sigg's mother told The Associated Press he turned himself in. She declined further comment. 
 
 THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below. 
 
 A suspect has been arrested in the abduction and killing of a 10-year-old girl in suburban Denver and attempted kidnapping of a runner. 
 
 Westminster police say they made the arrest after getting a tip that led them to a home Tuesday night. They plan to announce more details at a midday Wednesday press conference. 
 
 Jessica Ridgeway disappeared Oct. 5 and her body was found five days later in a field in a park. 
 
 The break comes two days after police said Jessica's abduction was linked to the attempted abduction of a 22-year-old runner in May at another park, the Ketner Lake Open Space. Police say their tip led them to a home near that park, which is close to Jessica's school. 
 
 The suspect will be charged in both cases.
– A terrifying chemical-rag attack earlier this year may help police find the killer of a 10-year-old Colorado girl, the Denver Post reports. Still investigating the murder of Jessica Ridgeway, police have released a description of a young man with brown hair who allegedly tried to abduct a Denver-area woman on May 28 by putting a rag with a chemical smell over her mouth. The woman was able to escape and call 911 on her cell phone. Police say they have connected the cases "in an attempt to uncover any lead" in Jessica's abduction and murder about two weeks ago. They are also looking through other attempted abductions in the Denver area. In another development, police have found a small wooden cross with three lines etched into it that could be key to Jessica's murder, Huffington Post reports. Police have uploaded images of the cross on their Facebook site in the hope someone who knows about the cross will come forward.